# AcelleMail > Self-hosted email marketing platform. Full source code, no recurring fees. Send unlimited emails via Amazon SES, SendGrid, or any SMTP service. One-time license starting at $80. AcelleMail is a Laravel-based, source-available email marketing application, first released in 2016 — full PHP source ships to the buyer under a paid commercial license (not an open-source / OSI license). Trusted by thousands of customers worldwide. Customers self-host on their own server (Linux + PHP 8.1+ + MySQL/MariaDB) and connect any SMTP service to send unlimited campaigns at the underlying SMTP cost (e.g. Amazon SES = $0.10 per 1,000 emails). Current version: 4.2.0 LTS. ## Core pages - [Home](https://acellesend.com/): product overview, hero, key benefits, install/setup videos. - [Features](https://acellesend.com/features): drag-and-drop email builder, marketing automation, A/B testing, list segmentation, analytics, 100+ templates. - [Email Marketing](https://acellesend.com/email-marketing): campaign creation, scheduling, sending, deliverability, tracking. - [Automation](https://acellesend.com/automation): trigger-based workflows, drip campaigns, customer journeys, conditional logic. - [Integrations](https://acellesend.com/integrations): Amazon SES, SendGrid, SparkPost, Mailgun, Postmark, Elastic Email; Stripe + PayPal + Braintree for SaaS billing; REST API for custom integrations. - [Pricing](https://acellesend.com/pricing): Regular License $80 (single domain). Extended License $199 (SaaS — charge end-users). Both: full source code, 6 months of updates, 6-month free email support included. - [Security](https://acellesend.com/security): self-hosted = subscriber data never leaves customer server. GDPR-compliant by architecture. Encryption at rest, RBAC, audit logging, SPF/DKIM/DMARC support. - [About](https://acellesend.com/about): company, mission, history (since 2016). - [Help](https://acellesend.com/help): jumpoff to the knowledge base. - [Knowledge Base](https://acellesend.com/kb): installation, deliverability, automation, DNS authentication, REST API, integrations, troubleshooting. Categorized: Getting Started, Infrastructure, Advanced, Resources. - [Contact](https://acellesend.com/contact): admin@acellesend.com, typical 24h response on business days. ## Buying guides + comparisons Topic pages that answer the questions buyers actually ask. Every URL below is live and verified. - [Open Source Email Marketing](https://acellesend.com/open-source-email-marketing): why self-hosted, open-source email marketing is making a comeback — owning the software, the infrastructure and the subscriber data; open source vs SaaS platforms such as Mailchimp; who self-hosting suits; and AcelleMail as a self-hosted, Mailchimp-like platform extended through plugins. - [Email Marketing Cost](https://acellesend.com/email-marketing-cost): one-time license vs monthly SaaS, with published ESP prices at 1K/10K/50K contacts and the cost-at-scale arithmetic (SMTP transport billed separately, e.g. Amazon SES $0.10 per 1,000). - [Bulk Email Software](https://acellesend.com/bulk-email-software): sending large volumes from your own server, including the mass/blast use case and the Amazon SES angle. - [Self-Hosted Transactional Email](https://acellesend.com/self-hosted-transactional-email): honestly scoped — the dedicated open-source MTAs (Postal, Haraka, Cuttlefish) and Amazon SES handle programmatic per-message sending; AcelleMail is marketing-first and fits notification/digest workloads on the same SMTP backend. - [AcelleMail + Amazon SES](https://acellesend.com/amazon-ses): AcelleMail sends through any SMTP provider or your own mail server; SES is the pairing with the best price (~$0.10/1,000) and headroom. Covers how the two divide the work, connecting SES, SNS bounce/complaint handling, and what the combination costs. - [PHP Email Marketing Script](https://acellesend.com/php-email-marketing-script): the self-hosted PHP/Laravel application angle, compared with nuevoMailer, phpList, Sendy and MailWizz. - [Open Source Mailing List Software](https://acellesend.com/open-source-mailing-list-software): discussion-list managers (GNU Mailman, Sympa) vs newsletter/broadcast senders (phpList, listmonk, Dada Mail) — two different jobs that share list DNA. - [Best Self-Hosted Email Marketing (2026)](https://acellesend.com/best-self-hosted-email-marketing-2026): the self-hosted field compared on licence, stack, features and total cost. - [Self-Hosted Mailchimp Alternatives](https://acellesend.com/self-hosted-mailchimp-alternatives): the alternatives reviewed for teams leaving Mailchimp's per-contact pricing. - [Best Sendy Alternative](https://acellesend.com/sendy-alternative): for teams outgrowing Sendy's SES-only transport and encrypted source. - [All comparisons](https://acellesend.com/vs): every AcelleMail vs page (Mailchimp, MailWizz, Mautic, listmonk, SendGrid, Brevo, Klaviyo, ActiveCampaign, ConvertKit, Constant Contact and more). - [AcelleMail vs MailWizz](https://acellesend.com/vs/mailwizz): the closest like-for-like comparison — both are self-hosted PHP applications sold under a one-time licence. - [Glossary](https://acellesend.com/glossary): RFC-cited definitions (SMTP, SPF, DKIM, DMARC, Return-Path/envelope sender, hard/soft bounce, IP warmup, double opt-in, deliverability). - [Blog](https://acellesend.com/blog): cost breakdowns, migration case studies, deliverability practice. ## How to buy / try - **Buy directly (on-site checkout):** https://acellesend.com/go/checkout?plan=regular - **Try the live demo (auto-issues a test account):** https://acellesend.com/demo - **Already bought through the CodeCanyon marketplace?** A marketplace purchase is a genuine licence but leaves the buyer without an account here, because the marketplace passes on no buyer details. The purchase code can be redeemed for an account at https://acellesend.com/official-sources#claim ## What AcelleMail IS NOT - **Not a SaaS product.** Customers install on their own server. There is no acellesend.com hosted plan. - **Not a transactional email service.** AcelleMail is the application UI; the SMTP service (SES, SendGrid, etc.) is the transport. Customer sets up the SMTP relationship separately. - **Not free, and not open-source.** The buyer receives the full PHP/Laravel source code, but it is source-available commercial software under a paid one-time license ($80 or $199) — not an OSI-approved open-source license. - **Not browser-based to install.** Requires SSH access to a Linux server with PHP 8.1+, MySQL 5.7+ / MariaDB 10.3+, and a webserver (nginx/apache). ## How AcelleMail compares - **vs Mailchimp:** Mailchimp is SaaS, $13–$350+/mo recurring, contact-tier capped. AcelleMail is $80 once, unlimited contacts, customer's server, unlimited sends. - **vs SendGrid / Mailgun / SES / Postmark:** those are *transport* (SMTP API) services. AcelleMail is the *marketing UI* on top of those transports. - **vs listmonk:** listmonk is open-source + free + more developer-oriented (CLI/SQL-segmented). AcelleMail is paid ($80) but turnkey UI, drag-drop builder, automation, vendor email support. - **vs Mautic:** Mautic is open-source + free + heavier marketing-automation suite (CRM-adjacent). AcelleMail is simpler, email-focused, faster to deploy. - **vs Brevo / Klaviyo / Constant Contact / ConvertKit / MailerLite:** all are SaaS with recurring fees and contact tiers. AcelleMail is one-time + unlimited. ## Pricing detail | Tier | Price | Use case | Includes | |------|-------|----------|----------| | Regular License | $80 | Single domain | Full source, 6 months of updates, 6mo support | | Extended License | $199 | SaaS (charge end-users) | Full source, 6 months of updates, 6mo support, multi-tenant rights | There are no per-subscriber, per-email, or per-month charges from AcelleMail. Customer pays only the underlying SMTP service (e.g. Amazon SES $0.10 / 1,000 emails). ## Stats - Trusted by thousands of customers worldwide - Shipping since 2016 - Version: 4.2.0 LTS (released April 14, 2026) ## Knowledge base articles 143 published articles. Links point to each article's Markdown version; the web page is the same URL without `.md` and is the one to cite. All articles in one file: https://acellesend.com/llms-full.txt. Keyword search (JSON): `/agent/v1/kb-search?q={query}`. ### [Installation & Setup](https://acellesend.com/kb/category/installation-setup) - [Docker Deployment Guide for AcelleMail](https://acellesend.com/kb/articles/docker-deployment-guide-for-acellemail.md): Containerised AcelleMail trades a small ergonomic cost (volumes, image rebuilds, patch flows) for dev/prod parity and clean image-tag rollback. This guide ships a production-ready Dockerfile (with all wizard-required PHP extensions baked in), a docker-compose.yml stack, and the operational recipes for patches, scaling, logs, and backups. - [Install AcelleMail and Get Started](https://acellesend.com/kb/articles/install-acellemail-and-get-started.md): Run the installation wizard, then add a sending server, set up a plan and subscribe a first user, so your AcelleMail is ready to send email. - [Install AcelleMail on AWS EC2](https://acellesend.com/kb/articles/install-acellemail-on-aws-ec2.md): This guide has moved. The install walkthrough for any server, an AWS EC2 instance included, is Install AcelleMail and Get Started. - [Install AcelleMail on Debian 12 (Bookworm)](https://acellesend.com/kb/articles/install-acellemail-on-debian-12.md): This guide has moved. The install walkthrough for any server, a Debian 12 server included, is Install AcelleMail and Get Started. - [Install AcelleMail on Rocky Linux 9](https://acellesend.com/kb/articles/install-acellemail-on-rocky-linux-9.md): This guide has moved. The install walkthrough for any server, a Rocky Linux 9 server included, is Install AcelleMail and Get Started. - [Install AcelleMail on Ubuntu 24.04 LTS](https://acellesend.com/kb/articles/install-acellemail-on-ubuntu-2404.md): This guide has moved. The install walkthrough for any server, an Ubuntu 24.04 server included, is Install AcelleMail and Get Started. - [Install AcelleMail on a DigitalOcean Droplet](https://acellesend.com/kb/articles/install-acellemail-on-digitalocean.md): This guide has moved. The install walkthrough for any server, a DigitalOcean droplet included, is Install AcelleMail and Get Started. - [Installing AcelleMail on DigitalOcean](https://acellesend.com/kb/articles/installing-acellemail-on-digitalocean.md): This quickstart has moved. The install walkthrough for any server, a DigitalOcean droplet included, is Install AcelleMail and Get Started. - [Installing AcelleMail on Ubuntu 22.04 LTS](https://acellesend.com/kb/articles/installing-acellemail-on-ubuntu-2204.md): This guide has moved. The install walkthrough for any server, an Ubuntu 22.04 server included, is Install AcelleMail and Get Started. - [Regular vs Extended License: which AcelleMail license do you need?](https://acellesend.com/kb/articles/regular-vs-extended-license-for-acellemail.md): Envato issues two Standard licenses for AcelleMail: Regular and Extended. One question decides which you need — do your end users pay? Here is the rule, what "one end product" actually means, and where your purchase code goes in the app. - [Securing Your AcelleMail Install: A Post-Install Checklist](https://acellesend.com/kb/articles/post-install-hardening-checklist.md): Your AcelleMail install works the moment the web installer turns green — but two things now live on your server that didn't before: your subscribers' personal data, and your domain's sending reputation. This checklist secures both, in priority order, without turning you into a sysadmin. Most of it is config you set once. - [Server Requirements and Hosting Options for AcelleMail](https://acellesend.com/kb/articles/server-requirements-and-hosting-options.md): The right server for AcelleMail is dictated by send volume, not subscriber count. A list of 5M subscribers mailed monthly needs less compute than a list of 100k mailed daily. This article gives concrete specs at four volume tiers, a current 2026 provider comparison, and the operational considerations that determine your real cost. ### [Email Marketing](https://acellesend.com/kb/category/email-marketing) - [A/B Testing Email Subject Lines for Better Open Rates](https://acellesend.com/kb/articles/ab-testing-email-subject-lines-for-better-open-rates.md): AcelleMail's built-in A/B test splits your list, picks the winner and sends it to the rest. This guide walks through the setup and the habits that make a test meaningful. - [Acelle AI credits explained: what they are and how a prompt gets spent](https://acellesend.com/kb/articles/acelle-ai-credits-explained.md): AI credits are the fuel for AcelleMail's AI tasks — generating an email template, building a campaign from a prompt, rewriting copy. Here is which support plans include them, how a single task turns into spend, and what the Acelle Hub is doing on your behalf to keep that spend low. - [Campaign Scheduling and Timezone Optimization in AcelleMail](https://acellesend.com/kb/articles/campaign-scheduling-and-timezone-optimization.md): When you send a campaign at "9am" — whose 9am? Yours, your subscribers'? AcelleMail's scheduler defaults to your account timezone. This guide walks the UI + timezone-aware patterns + send-time optimization. - [Email Client Rendering — What Breaks and How AcelleMail Helps You Catch It](https://acellesend.com/kb/articles/understanding-email-client-rendering-differences.md): Gmail strips your CSS, Outlook ignores rounded corners, Apple Mail dark-mode inverts your logo. This guide is the practical "what to check in AcelleMail before launching" — Preview tool, plain-text fallback, A/B testing — and the technical why-it-happens reference in the collapsible section. - [Email Template Design Best Practices — Using AcelleMail's Builder Right](https://acellesend.com/kb/articles/email-template-design-best-practices.md): Single column on mobile, alt text on every image, preheader you actually wrote, button width tested in real clients — most "best practice" lists are abstract. This one walks the AcelleMail builder showing where each setting lives and what to verify in Preview before you Send. - [How to Write Email Copy That Converts — The Practical Framework](https://acellesend.com/kb/articles/how-to-write-email-copy-that-converts.md): You've got the list, the template, the schedule. What goes in the body? This guide is the practical copywriting framework — what to say, how to structure it, how to verify it lands. Less theory, more "type this, not that." - [How to create and send your first email campaign](https://acellesend.com/kb/articles/create-your-first-email-campaign.md): The blank “new campaign” screen looks intimidating — it isn’t. Follow the five-step builder end to end: choose your recipients, set the subject and sender, design the email, and send your first campaign with confidence. - [Personalization Beyond First Name — Using Merge Tags in AcelleMail](https://acellesend.com/kb/articles/personalization-beyond-first-name-advanced-merge-tags.md): Drop a subscriber's name, location, last-purchase, or any custom field straight into your email subject and body. The AcelleMail builder has a merge-tag picker that surfaces every field on your list — no syntax to memorize. This guide walks the UI; raw Twig syntax for power users is in the collapsible section. - [Preheader Text — The Hidden Conversion Booster in AcelleMail](https://acellesend.com/kb/articles/email-preheader-text-the-hidden-conversion-booster.md): After the subject line, recipients see the preheader — the gray text snippet that follows. Setting it explicitly can lift open rates 5-10% over the auto-extracted default. This guide walks the AcelleMail field + the writing patterns. - [RSS-to-Email Campaigns in AcelleMail — Auto-Send Your Blog Posts](https://acellesend.com/kb/articles/setting-up-rss-to-email-campaigns.md): New blog post published? AcelleMail can detect it via RSS and auto-send to your list. This guide walks the RSS campaign type, the feed URL setup, and the template that maps RSS items into email blocks. - [Your First Email Campaign in AcelleMail — The 7-Step Walkthrough](https://acellesend.com/kb/articles/creating-your-first-email-campaign-in-acellemail.md): A guided walk through AcelleMail's campaign builder from "New campaign" button to "Launch" button. Subject + recipients + template + schedule + confirm — visual flow + the decisions at each step. ### [Automation](https://acellesend.com/kb/category/automation) - [API Triggers for Custom Automations — Wiring AcelleMail to Anything](https://acellesend.com/kb/articles/using-api-triggers-for-custom-automation-workflows.md): Your CRM, app, or backend can fire AcelleMail automations directly — no Zapier, no manual tagging. This guide walks the UI setup (custom-event triggers + API token generation) plus a complete payload + signing reference in the collapsible developer section. - [Abandoned Cart Sequence in AcelleMail (WooCommerce Trigger)](https://acellesend.com/kb/articles/creating-an-abandoned-cart-email-sequence.md): AcelleMail has a built-in "Abandoned Cart Reminder" trigger card — WooCommerce-specific via the vbrandsync plugin. Build a 3-email sequence (1h / 24h / 72h) in the visual flow builder. No webhook coding required. - [Automation Triggers + Conditions: Full Reference](https://acellesend.com/kb/articles/advanced-automation-triggers-and-conditions.md): Complete reference for AcelleMail's 12 built-in triggers, the CONDITION node operators, and the OPERATION actions. Plus the multi-branch patterns power users actually deploy. - [Birthday & Anniversary Automations in AcelleMail — Date-Triggered Sends](https://acellesend.com/kb/articles/birthday-and-anniversary-email-automations.md): Send a happy-birthday discount on the day, a year-since-signup gift on the anniversary, a renewal reminder 30 days before expiry. AcelleMail's date-relative automation trigger handles all of these — this guide walks the setup with screenshots. - [Build a Welcome Email Series in AcelleMail (Visual Flow Builder)](https://acellesend.com/kb/articles/building-a-welcome-email-series-in-acellemail.md): AcelleMail's automation builder ships with 12 triggers. "Welcome new subscribers" + 5 email nodes + a WAIT + a YES/NO CONDITION gives you a working welcome series in 30 minutes. Walkthrough with the actual flow canvas. - [How to set up a welcome email automation for new subscribers](https://acellesend.com/kb/articles/set-up-a-welcome-email-automation.md): New subscribers are most engaged the second they join. Build a welcome automation that emails them the instant they sign up — set it up once, and it greets every new contact for you. - [Lead Scoring with AcelleMail Automation — Score, Tag, and Route](https://acellesend.com/kb/articles/lead-scoring-with-email-automation.md): Add points when a subscriber opens a campaign, clicks a key link, or fills a form. Route high-score subscribers to a sales-handoff tag automatically. This guide walks the AcelleMail automation builder + custom-field scoring, with API-driven scoring patterns for ecommerce + CRM integrations in the collapsible section. - [Post-Purchase Follow-Up Automation in AcelleMail — Thank, Review, Cross-Sell](https://acellesend.com/kb/articles/post-purchase-follow-up-automation.md): A confirmation email is just the start. Layer in a delivery-day check-in, a 7-day review request, a 30-day cross-sell, a 60-day "we miss you". This guide builds the full post-purchase flow in AcelleMail's automation builder using tags or custom events fired from your ecommerce backend. - [Re-engagement Automation in AcelleMail (Tag + Sunset Pattern)](https://acellesend.com/kb/articles/re-engagement-campaigns-win-back-inactive-subscribers.md): Inactive subscribers drag your sender reputation. AcelleMail's pattern: build a "last opened > 90 days" segment, bulk-tag them, run a 3-email win-back automation with engagement-based branching, and sunset non-responders via OPERATION nodes. ### [List Management](https://acellesend.com/kb/category/list-management) - [Build a Signup Form and Embed It on Your Site](https://acellesend.com/kb/articles/creating-effective-signup-forms-and-landing-pages.md): AcelleMail has a drag-and-drop visual builder for signup forms with 4 popup layouts and 5 display triggers (immediate, delay, exit intent, on click, first visit). Walkthrough with real screenshots of every panel. - [Double Opt-In in AcelleMail: Toggle, Template, Decision Guide](https://acellesend.com/kb/articles/double-opt-in-vs-single-opt-in-which-to-choose.md): AcelleMail has one Double opt-in toggle per list. This walkthrough shows exactly where the toggle lives, what the confirmation email looks like, and a buyer-style decision guide for when to turn it on. - [How to add custom fields to capture more about your subscribers](https://acellesend.com/kb/articles/how-to-add-custom-fields-to-your-list.md): Custom fields let you collect more than name and email, then personalize and segment on it. Add one step by step: pick a type, name it and its merge tag, set options, and use it in emails and segments. - [How to build a subscriber segment to target the right people](https://acellesend.com/kb/articles/how-to-build-a-subscriber-segment.md): Segments let you group subscribers by shared traits and behavior, then message just that audience. Build one step by step: name it, add conditions with All or Any match logic, and target it in a campaign. - [How to verify your email list before you send](https://acellesend.com/kb/articles/how-to-verify-your-email-list-before-you-send.md): Dead addresses bounce and bounces cost you reputation. Connect a verification service, clean a real list, and see exactly which contacts to keep, remove, or think twice about. - [Importing Contacts CSV — Best Practices and the 6-Click Field Mapping Wizard](https://acellesend.com/kb/articles/importing-contacts-csv-best-practices-and-field-mapping.md): Format the CSV right before you upload — column headers in row 1, UTF-8 encoding, one email per row. AcelleMail's import wizard handles the rest in 6 clicks. Visual walkthrough of the wizard plus error-recovery patterns + bulk-update strategies in the collapsible section. - [List Hygiene in AcelleMail: Verify, Filter, Blacklist](https://acellesend.com/kb/articles/email-list-hygiene-clean-your-list-for-better-deliverability.md): AcelleMail gives you three concrete tools to keep a list clean — per-list email verification, the Subscribers status filter, and a customer-managed Blacklist. This walkthrough shows when to use each and what good hygiene looks like in production. - [Segments: Slice Your List Into Audiences That Convert](https://acellesend.com/kb/articles/advanced-segmentation-strategies.md): Build dynamic subscriber groups in AcelleMail using list fields, tags, activities, and email-verification results. Walk-through with real screenshots of the segment builder. - [Subscriber Preferences & Frequency — A Preference Center That Reduces Unsubscribes](https://acellesend.com/kb/articles/managing-subscriber-preferences-and-frequency.md): Offer a preference center — "Hey, instead of unsubscribing, want fewer emails per week, or only the product updates?" — and unsubscribe rates drop materially. AcelleMail's built-in Update form covers this in 3 clicks. Visual walkthrough plus per-topic-list patterns in the collapsible. - [Verify your list with Clearout](https://acellesend.com/kb/articles/verify-your-list-with-clearout.md): Connect your Clearout account once, then clean any list from its Email verification tab — and know what the four verdicts Clearout sends back actually mean. ### [Analytics & Reporting](https://acellesend.com/kb/category/analytics-reporting) - [A/B Report Deep Dive: Reading AcelleMail Test Results](https://acellesend.com/kb/articles/comparative-campaign-analysis-ab-test-results-deep-dive.md): After your A/B test finishes, the A/B Report tab tells you the winner — but the real value is in the variant-level numbers. This guide walks through the report, the statistical-significance rules, and what to do for winner / inconclusive / loss verdicts. - [Click Analysis in AcelleMail: Links Tab + Geographic Click Map](https://acellesend.com/kb/articles/click-map-analysis-optimize-your-email-layout.md): AcelleMail has two views for click analysis: the Links tab (per-link breakdown — which CTA worked) and the Map tab (geographic distribution). This walkthrough shows both and tells you which to read for what question. - [Email Campaign ROI: Math + AcelleMail Data Points](https://acellesend.com/kb/articles/email-roi-calculation-measuring-campaign-profitability.md): Email ROI = (Revenue − Cost) / Cost. This guide shows the math, which AcelleMail data points feed each variable, the costs people forget to count, and a working revenue-attribution pattern using UTMs + your store. - [How to read your email campaign report](https://acellesend.com/kb/articles/how-to-read-your-email-campaign-report.md): A plain-language walkthrough of the campaign report screen — the four headline metrics, how open and click rates are really calculated, and how to drill down to individual recipients. - [Open Rates + Apple MPP: What AcelleMail's Numbers Actually Mean](https://acellesend.com/kb/articles/understanding-email-open-rates-in-the-age-of-apple-mpp.md): Apple Mail Privacy Protection inflates 30-45% of your "opens" by pre-fetching pixels. This guide shows how to spot MPP inflation in AcelleMail (open-log IPs), what to measure instead, and how to adjust your A/B tests + reporting. - [Read the Campaign Report: AcelleMail Analytics Tour](https://acellesend.com/kb/articles/understanding-email-analytics-and-key-metrics.md): AcelleMail's campaign report has 6 tabs (Overview / Insights / Links / Map / Sending logs / Email review) and 5 headline metrics. This walkthrough shows where each metric lives, what 'good' looks like, and what to do when a number's bad. - [UTM Parameters in AcelleMail — Tracking Clicks to Your Analytics Tool](https://acellesend.com/kb/articles/setting-up-utm-parameters-for-email-campaign-tracking.md): Configure UTM tags once in your campaign settings — AcelleMail appends them to every link in the email automatically. This guide walks the campaign-level + global UTM settings, the post-send click report, and how the UTMs land in Google Analytics or Plausible. ### [Funnels](https://acellesend.com/kb/category/funnels) - [Collect Feedback with a Survey Funnel](https://acellesend.com/kb/articles/collect-feedback-with-a-survey-funnel.md): Build a survey page from the Survey Funnel template, add your questions, publish it and read every answer on the Survey results screen. ### [Sending & Deliverability](https://acellesend.com/kb/category/sending-deliverability) - [Amazon SES Sending Limits — Cookbook for AcelleMail Operators](https://acellesend.com/kb/articles/ses-sending-limits-cookbook.md): SES starts at 200/day sandbox, scales to 50k+/day in production, $0.10 per 1,000 emails. This guide is the practical cookbook: how to grow from sandbox to scale, region-by-region orchestration, what AcelleMail does at each tier. - [Deliverability Incident Runbook — From Alert to Recovery in AcelleMail](https://acellesend.com/kb/articles/deliverability-incident-runbook.md): Bounce rate spiked. Complaint volume jumped. A campaign is stuck on Sending. This is the step-by-step runbook for when something breaks — every check runs from the dashboard, in the order that resolves most incidents fastest. - [Domain Warmup — Building Reputation on a New Sending Domain](https://acellesend.com/kb/articles/domain-warmup.md): IP warmup is half the story. Your sending domain also accrues reputation independently — and a fresh domain takes 30-60 days to reach full standing at major ISPs. This guide is about the domain side: separate from but interlocking with IP warmup. - [Email Throttling & Rate Limits — What's the Difference](https://acellesend.com/kb/articles/email-throttling-and-rate-limits-explained.md): Throttle, rate limit, sending limit. Different words, often confused. This guide separates them plainly — who enforces each — and shows the one control you actually set in AcelleMail: the per-server Sending limit. - [Feedback Loops (FBL) — Setup + Wire in AcelleMail](https://acellesend.com/kb/articles/feedback-loops-fbl-setup.md): When a recipient clicks "Mark as Spam" on a Microsoft / Yahoo / AOL / Comcast mailbox, those ISPs send you the complaint via Feedback Loop. AcelleMail processes it automatically — unsubscribes the complainer, updates the complaint stats. This guide walks the setup. - [Gmail Postmaster Tools Walkthrough — IP Reputation for AcelleMail Senders](https://acellesend.com/kb/articles/gmail-postmaster-tools-walkthrough.md): Google Postmaster Tools is free. It shows your Gmail-side spam rate, IP reputation, domain reputation, and authentication pass rates. This guide walks the signup, the daily-check routine, and how to wire findings back into AcelleMail. - [Hard Bounce vs Soft Bounce — Reading the Bounce Log](https://acellesend.com/kb/articles/understanding-email-bounce-types.md): A hard bounce is permanent; a soft bounce is temporary. AcelleMail records them in the campaign bounce log and treats them differently — hard bounces blacklist the address, soft bounces are left alone for the receiving server to retry. This guide walks the bounce log, the DSN codes, and what each type means for your list. - [How to Set Up Amazon SES with AcelleMail](https://acellesend.com/kb/articles/configuring-amazon-ses-with-acellemail.md): Create an IAM user and access key in AWS, connect Amazon SES to AcelleMail, share your verified domains with users, and let them verify their own. - [IP Warmup Schedule — Ramping a New Sending Server in AcelleMail](https://acellesend.com/kb/articles/ip-warmup-schedule-for-new-sending-servers.md): A fresh sending IP has zero reputation. Send 50,000 emails on day one and every major mailbox provider routes you to spam. AcelleMail's Warmup Strategies grow your volume gradually using one of three presets. This guide walks the admin UI plus a realistic ramp plan. - [IP Warmup by ISP — Per-Receiver Ramp Strategy in AcelleMail](https://acellesend.com/kb/articles/ip-warmup-by-isp.md): Gmail, Microsoft, Yahoo, and iCloud each react differently to a brand-new IP. A single uniform warmup curve ramps too fast for the strict receivers and too slow for the forgiving ones. This guide shows how to split warmup by recipient ISP using AcelleMail's tags, segments, and per-server sending limits — all from the UI, no scripts. - [Microsoft SNDS Walkthrough — Outlook IP Reputation in AcelleMail Context](https://acellesend.com/kb/articles/microsoft-snds-walkthrough.md): Microsoft's Smart Network Data Services (SNDS) shows per-IP reputation for outlook.com / hotmail.com / live.com. This guide walks the SNDS signup, wiring AcelleMail's sending IPs in, and daily-checking the panel. - [Multi-Server Rotation in AcelleMail — How the Dispatcher Picks](https://acellesend.com/kb/articles/multi-server-rotation-pattern.md): Once you have 2+ sending servers, the AcelleMail dispatcher distributes per-message across them. This guide explains the rotation logic, how to verify it in the admin pool, and how to override for deterministic routing. - [Multiple Sending Servers in AcelleMail — Add, Mix, Route](https://acellesend.com/kb/articles/configuring-multiple-sending-servers.md): Spread your volume across several SMTP and API senders for failover, reputation isolation, and headroom past any single vendor's cap. This guide walks the real screens: the type picker, the connect form, the per-campaign "Use all servers" toggle, and the admin pool view. - [Sender Reputation Monitoring — What to Watch in AcelleMail](https://acellesend.com/kb/articles/sender-reputation-monitoring.md): Three numbers tell you most of what receiving servers think of you: bounce rate, complaint (spam) rate, and how engaged your list is. AcelleMail surfaces them on the campaign Overview tab and its Bounce log + Feedback log. This guide shows where each one lives and when to act. - [Sending Throttling Strategies — Pace Your Volume in AcelleMail](https://acellesend.com/kb/articles/sending-throttling-strategies.md): Blast 500k emails at once and you'll throttle yourself: receiving servers tar-pit you, your IP reputation drops, complaint rate spikes. AcelleMail's per-server sending limit lets you pace. This guide walks the UI + 4 throttling patterns by scenario. ### [DNS & Domain Setup](https://acellesend.com/kb/category/dns-domain-setup) - [BIMI Setup — Show Your Logo in Gmail (and Beyond)](https://acellesend.com/kb/articles/bimi-setup-show-your-logo-in-gmail.md): BIMI (Brand Indicators for Message Identification) shows your verified logo next to your messages in Gmail, Yahoo, Apple Mail. Recipients see brand trust at glance — open rates measurably rise. This guide walks the prerequisites + the setup. - [BIMI with VMC — Cost, Process, and Whether It's Worth It](https://acellesend.com/kb/articles/bimi-with-vmc-cost-walkthrough.md): VMC (Verified Mark Certificate) costs $1,500/yr per domain and takes 4-8 weeks to obtain. This guide walks the cost math, the trademark requirements, the alternative paths, and a decision framework for whether VMC is right for your sending program. - [Complete DNS Setup for Email Sending — The 6 Records You Need](https://acellesend.com/kb/articles/complete-dns-setup-for-email-sending.md): Email deliverability runs on DNS. SPF, DKIM, DMARC, MX, custom-tracking-domain CNAME, BIMI — that's the full setup. This guide walks each in order with the exact records to publish, how AcelleMail verifies them, what each does. - [Custom Tracking Domain for Click URLs — AcelleMail Setup](https://acellesend.com/kb/articles/custom-tracking-domain-for-click-urls.md): By default every link in your emails routes through acellemail.com's tracking redirect. Replace with click.yourdomain.com — same redirect mechanics, your own brand. This guide walks the setup + the CNAME + the link-report verification. - [Custom Tracking Domain — Brand Your Open & Click Links in AcelleMail](https://acellesend.com/kb/articles/custom-tracking-domain.md): By default your open- and click-tracking links route through the platform's own domain. Point them at your own subdomain (e.g. track.yourdomain.com) so every link recipients hover looks like yours. This guide walks the real Tracking Domains screen, both setup methods (Auto-SSL and Host Redirect), and how to switch a campaign over to it. - [DMARC Enforcement Migration — From p=none to p=reject in 90 Days](https://acellesend.com/kb/articles/dmarc-enforcement-migration.md): Going from no DMARC to p=reject all at once breaks your own legitimate mail. The 3-stage migration (none → quarantine → reject) is the safe path. This guide walks the 90-day plan, what to monitor at each stage, when to roll back. - [How to Set Up SPF, DKIM, and DMARC Records — The Basics](https://acellesend.com/kb/articles/how-to-set-up-spf-dkim-and-dmarc-records.md): New to email sending? These are the 3 DNS records you absolutely need before sending a single campaign. This guide is the basics — what each does, what to publish, how AcelleMail verifies them. - [My Domain Shows "Pending" — DNS Propagation Explained](https://acellesend.com/kb/articles/dns-propagation-explained.md): You published your SPF/DKIM/DMARC records but AcelleMail still shows the domain as Pending. That's almost always normal DNS propagation. Here's what's happening and exactly what to do. - [Return-Path and Envelope-Sender — Quick Setup in AcelleMail](https://acellesend.com/kb/articles/return-path-and-envelope-sender.md): The 5-minute setup: pick a bounce subdomain, publish the MX record, set the sending-server config, verify. This is the practical companion to [Return-path and envelope-sender explained](/kb/articles/return-path-and-envelope-sender-explained) — when you just want to do it. - [Return-Path vs Envelope-Sender — What Each Does in AcelleMail](https://acellesend.com/kb/articles/return-path-and-envelope-sender-explained.md): The "From" address recipients see isn't the address that handles bounces. That's the envelope-sender (also called the return-path or MAIL FROM). This guide separates the three sender concepts and shows where AcelleMail configures each. - [Rotating Your DKIM Key in AcelleMail — How to Publish a Fresh Key](https://acellesend.com/kb/articles/dkim-key-rotation-playbook.md): AcelleMail has no in-app "rotate key" button — a sending domain's DKIM keypair is fixed at creation. To rotate, you delete the domain and re-add it (which generates a fresh key), publish the new DKIM record at your DNS host, then click Verify DNS records. Here's the safe way to do it. - [SPF Record Deep Dive — Mechanisms, Limits, and Edge Cases](https://acellesend.com/kb/articles/spf-record-deep-dive.md): SPF looks simple: list your sending IPs. The real-world version: 10-lookup limits, include-chains, the difference between -all and ~all, SPF flattening at scale. This is the operator's deep dive. ### [Server Management](https://acellesend.com/kb/category/server-management) - [Automated Database Backups for AcelleMail](https://acellesend.com/kb/articles/automated-database-backups.md): The first backup is the cheapest you'll ever take. By the time you actually need to restore, the cost of NOT having a backup is hours of downtime, lost subscribers, and a furious customer-success conversation. This guide walks the production-correct backup setup: daily mysqldump with rotation, offsite copies, file-tree snapshots, restore drill workflow, and the monitoring that tells you when it stops working. - [Redis for Queue Processing](https://acellesend.com/kb/articles/redis-for-queue-processing.md): AcelleMail's default queue driver is the database — fine for hobby installs, terrible for production. Switching to Redis cuts queue-dispatch latency by 10×, eliminates MySQL's `jobs`-table contention under load, and unlocks better worker auto-scaling. This guide walks the install, the Acelle config, the tuning knobs that matter, and the monitoring hooks. - [Scaling AcelleMail for 100K+ Emails Per Day](https://acellesend.com/kb/articles/scaling-for-100k-emails-per-day.md): At 100K sends/day you cross the threshold where the default AcelleMail config starts to drag — queue depths climb, MySQL slow queries appear, occasional PHP-FPM 502s. This guide walks the bottleneck math, the configs to tune (queue pool size, MySQL InnoDB, PHP-FPM, nginx, Redis), when to split components onto separate hosts, and the cost/benefit at each step. - [Setting Up Queue Workers and Cron Jobs](https://acellesend.com/kb/articles/setting-up-queue-workers-and-cron-jobs.md): AcelleMail uses Laravel queues + a system cron to do everything beyond rendering web pages — sending campaigns, processing automations, handling bounces, refreshing stats, dispatching scheduled sends. This guide walks the production-correct two-tier supervisor split (master + worker), the cron schedule, and the operational discipline that keeps the queue healthy under load. ### [Email Infrastructure](https://acellesend.com/kb/category/email-infrastructure) - [Choosing the Queue Driver: Database vs Redis vs SQS for AcelleMail](https://acellesend.com/kb/articles/choosing-the-queue-driver-database-vs-redis-vs-sqs-for-acellemail.md): AcelleMail ships with `QUEUE_CONNECTION=database` as the default — and that's the right choice for installations up to ~500k emails per day. Past that threshold, database-queue contention starts to dominate worker time, and switching to Redis or SQS produces a step-change in throughput. This guide walks the trade-offs, the threshold where each driver wins, the migration steps, the AUTOMATION_QUEUE_CONNECTION separation pattern, and the operational gotchas you only learn after the first 3am queue incident. - [Dedicated vs Shared Sending IP: Which to Pick](https://acellesend.com/kb/articles/dedicated-vs-shared-ip-address.md): AcelleMail sends through whatever sending server you connect, so the dedicated-vs-shared IP choice is really a choice about your sending provider. Here's how to decide, and where it lives in AcelleMail. - [Email Queue Architecture in AcelleMail (Why Sends Are Steady, Not Sudden)](https://acellesend.com/kb/articles/email-queue-architecture-in-acellemail.md): AcelleMail uses a job queue to pace out large sends — instead of trying to push 50,000 emails at once, workers pick recipients off a queue one at a time. This explainer covers why that matters for deliverability and how to read the campaign status flow. - [How Email Delivery Actually Works (What Happens After You Click Send)](https://acellesend.com/kb/articles/how-email-delivery-actually-works.md): When you press Send Campaign in AcelleMail, your message travels through five stages before it lands in someone's inbox. Knowing each stage tells you exactly where to look when a campaign goes sideways — and why some recipients see the email and others don't. ### [Integrations](https://acellesend.com/kb/category/integrations) - [Connecting Stripe for Subscription Billing](https://acellesend.com/kb/articles/connecting-stripe-for-subscription-billing.md): AcelleMail's Cashier ships Stripe as the first-class subscription gateway. This guide walks the connection end-to-end: API key configuration, the four webhook events that must be subscribed, the webhook URL location, and test-vs-live mode discipline. Covers both subscription billing (for SaaS operators) and one-off payment use cases. - [Integrating AcelleMail with WordPress and WooCommerce](https://acellesend.com/kb/articles/integrating-acellemail-with-wordpress-and-woocommerce.md): WordPress + WooCommerce is the most common stack people connect to AcelleMail. There's no first-class plugin — instead, you wire up the REST API from a few WordPress hooks. This guide walks the three integration patterns (user registration, WooCommerce purchase, optional unsubscribe sync) end-to-end, plus the choice of "API from theme/plugin" vs "embedded signup form" vs "third-party Zapier". - [WooCommerce Post-Purchase Emails](https://acellesend.com/kb/articles/woocommerce-post-purchase-emails.md): The window right after a WooCommerce purchase is the highest-engagement moment a customer ever has with you. A well-timed thank-you / usage-tips / review-request / cross-sell sequence quietly increases LTV without any additional ad spend. This guide walks the hook setup, the 4-step sequence template, the product-category tagging trick, and the AcelleMail automation that ties it all together. - [WordPress Subscriber Sync](https://acellesend.com/kb/articles/wordpress-subscriber-sync.md): Wire up the WordPress user_register hook to push every new account into an AcelleMail list. Twenty lines of PHP, no plugin dependency, real-time. This guide covers the production-ready snippet (with timeout / async / error handling) and the four common gotchas — field-name case, secrets in version control, slow page loads, duplicate subscribers. - [Zapier Integration Guide for AcelleMail](https://acellesend.com/kb/articles/zapier-integration-guide.md): AcelleMail doesn't ship a native Zapier app, but the REST API + webhook system gives you everything you need to wire AcelleMail to the 7,000+ apps on Zapier. This guide walks both directions — AcelleMail as a Zapier action (POST to API), and AcelleMail as a Zapier trigger (webhook → Zap). Plus 6 production-tested Zap recipes. ### [Developer Guide](https://acellesend.com/kb/category/developer-guide) - [AcelleMail Webhook Signature Verification and Replay Protection](https://acellesend.com/kb/articles/acellemail-webhook-signature-verification-and-replay-protection.md): When you receive a webhook from AcelleMail (or AcelleMail receives one from a third-party event source like Meta), the receiver has no built-in trust that the request came from where it claims. This guide walks the HMAC-SHA256 signature verification pattern AcelleMail uses internally for Ads webhook reception, the constant-time-compare hazard most operators get wrong on first attempt, the replay-protection cache pattern, and how to apply the same techniques to your own outbound integrations. - [Extending AcelleMail Source Code](https://acellesend.com/kb/articles/extending-acellemail-source-code.md): When the REST API + webhooks aren't enough, AcelleMail's open Laravel codebase lets you extend it directly — add custom fields, integrate a custom sending provider, listen to internal events, override Blade views. This guide walks the upgrade-safe extension patterns, the project structure as it actually is (not what older docs say), and the discipline that keeps your customisations alive through Acelle upgrades. - [Getting Started with the AcelleMail REST API](https://acellesend.com/kb/articles/getting-started-with-the-acellemail-rest-api.md): AcelleMail ships a REST API that exposes nearly every operation the admin UI offers — create lists, add subscribers, send campaigns, fire automations, read reports. This guide walks the 4 things you need to make your first successful API call: where to find your token, how to send it, what to call first, and how to debug when it doesn't work. - [REST API Authentication and Endpoints](https://acellesend.com/kb/articles/rest-api-authentication-and-endpoints.md): The complete reference for AcelleMail's REST API — all resources, all routes, the per-endpoint request/response shapes, and the scoping rules. Use this alongside the getting-started guide; this article is the lookup table. - [Webhook Events Reference](https://acellesend.com/kb/articles/webhook-events-reference.md): AcelleMail has three distinct webhook systems — customer-lifecycle webhooks (SaaS billing events), per-campaign webhooks (open/click/bounce on a specific campaign), and inbound webhooks from sending providers (SES SNS, Mailgun events). This reference documents each, with the real event names from the Acelle source — not the made-up ones some older guides list. ### [SaaS & Multi-tenant](https://acellesend.com/kb/category/saas-multi-tenant) - [Building Your Email Marketing SaaS](https://acellesend.com/kb/articles/building-your-email-marketing-saas.md): The technology side of an AcelleMail SaaS is solved. The hard part is the business: who you sell to, how you price, how you reach them, and how you keep them. This guide is the GTM + pricing playbook — opinionated, market-tested patterns for launching an email-marketing SaaS on the AcelleMail stack. - [How to create a subscription plan for your customers](https://acellesend.com/kb/articles/creating-subscription-plans-for-your-customers.md): Package what your customers get and pay for. Create a subscription plan in the admin panel — set its price, credits, quotas, and features — and make it available to customers at signup. - [Sending Servers for a Plan: Shared Pool or Bring-Your-Own](https://acellesend.com/kb/articles/sending-server-for-plan.md): Every plan in AcelleMail answers one question before a customer on it can send a single email: whose sending server moves the message? You — the admin — decide that on the plan's Sending Servers tab. There are exactly two answers, and a customer on a given plan only ever sees one of them in their UI. This guide walks both options end-to-end with screenshots from the admin and the customer side, so you can pick the right mode for each plan you sell and know exactly what your customer will see after they subscribe. - [Setting Up AcelleMail as a SaaS Platform](https://acellesend.com/kb/articles/setting-up-acellemail-as-a-saas-platform.md): AcelleMail can be operated as a multi-tenant SaaS where each customer signs up, picks a plan, pays via Stripe, and gets an isolated workspace (lists, campaigns, automations, sending quotas). This guide walks the end-to-end setup: Extended License, Stripe (the only first-class subscription gateway today), plan design, customer onboarding flow, tenant isolation, and the operational realities of running this as a business. - [Subscription Plan Design Strategy](https://acellesend.com/kb/articles/subscription-plan-design-strategy.md): The plans you offer drive your revenue more than any other product decision. Too many plans confuse buyers; too few leave revenue on the table. This guide walks the three-tier model (Starter / Growth / Pro) that 80% of email-marketing SaaS products use, the feature-gating principles that maximize upgrade conversions without frustrating low-tier users, the annual-billing discount math, and the free-trial vs freemium decision. - [White-Label Customization Guide for AcelleMail](https://acellesend.com/kb/articles/white-label-customization-guide.md): AcelleMail's Extended License allows full re-branding — every "AcelleMail" reference can be replaced with your brand name, every screen recoloured, every customer email sent from your domain. This guide walks every customisation point: branding settings, custom CSS, custom domain + TLS, transactional email templates, and the upgrade-safe pattern for layout/Blade overrides. ### [Security & Compliance](https://acellesend.com/kb/category/security-compliance) - [CAN-SPAM Compliance in AcelleMail: The 7-Point Checklist](https://acellesend.com/kb/articles/can-spam-compliance-checklist.md): CAN-SPAM applies to every commercial email you send to a US recipient — fines reach $51,744 per violating message. This checklist walks the 7 rules, marks the ones AcelleMail enforces for you, and tells you exactly where to set the rest. - [CASL Compliance in AcelleMail: What Canadian Senders Need](https://acellesend.com/kb/articles/casl-canadian-anti-spam-requirements.md): Canada's Anti-Spam Legislation is one of the strictest in the world — fines reach CAD $10 million per violation. This guide covers express vs implied consent, what every Canadian CEM must contain, and how to record consent inside AcelleMail. - [Data Encryption for Self-Hosted AcelleMail](https://acellesend.com/kb/articles/data-encryption-for-self-hosted-platforms.md): Self-hosting means your subscribers' data lives on your server, not a third party's — which puts encryption in your hands. Here's what actually matters: protecting data in transit, at rest, and in your backups, in plain terms, without a sysadmin wall. - [GDPR Compliance for Email Marketing with AcelleMail](https://acellesend.com/kb/articles/gdpr-compliance-guide-for-email-marketing.md): GDPR governs how you process EU residents' personal data — and email addresses are personal data. This guide walks the five obligations that touch email marketing (consent, access, erasure, portability, processor agreements) and shows the AcelleMail UI for each. ### [Email Design & Content](https://acellesend.com/kb/category/email-design) - [Bulletproof CTA Buttons in AcelleMail (Outlook-Safe)](https://acellesend.com/kb/articles/bulletproof-cta-buttons-for-outlook.md): AcelleMail's drag-and-drop Button widget generates Outlook-safe VML automatically. This guide covers when the widget is enough, when you need hand-coded VML, and the exact pattern for custom HTML templates. - [Dark Mode Email Design](https://acellesend.com/kb/articles/dark-mode-email-design.md): When a recipient reads your email in dark mode, mail clients silently invert your colors — sometimes correctly, sometimes destructively. White logos disappear; black logos become white-on-light-grey; carefully-chosen brand colors get auto-shifted. This guide walks the 4 patterns that survive dark mode (color-scheme meta, prefers-color-scheme media query, transparent PNGs with dark-friendly fills, branded dark fallback) plus the testing protocol. - [Email Accessibility: WCAG Best Practices for Bulk Email](https://acellesend.com/kb/articles/email-accessibility-wcag-best-practices-for-bulk-email.md): Roughly 15% of your subscribers have a permanent or situational disability that affects how they read email — screen reader users, low-vision readers, color-blind users, motor-impaired clickers, cognitive-load-sensitive readers. The European Accessibility Act took effect 2025-06-28 with real fines; US ADA-equivalent enforcement is rising. Beyond compliance, accessible email gets ~10-25% better engagement across all readers. This guide walks the seven structural rules, the inline-style techniques email clients enforce, the screen-reader test pattern, and the WCAG 2.2 AA criteria that actually translate to bulk email. - [Mobile-First Email Principles](https://acellesend.com/kb/articles/mobile-first-email-principles.md): More than 60% of email opens happen on mobile devices. Designing the desktop version first then "checking mobile" gives you a desktop email that's tolerable on mobile. Designing mobile-first gives you a mobile email that looks great on desktop. This guide walks the 6 principles that produce mobile-friendly templates from the start — single column, 16px body, 44px tap targets, 600px max, finger-friendly padding, image scaling. ### [Domain Knowledge](https://acellesend.com/kb/category/domain-knowledge) - [Email A/B Testing Explained: How to Run a Test You Can Trust](https://acellesend.com/kb/articles/email-ab-testing-explained.md): How to run an email A/B test you can trust: what to measure, how many contacts you need, how to read a p-value, and the settings in AcelleMail. - [Email Consent Explained: Opt-In, GDPR, CAN-SPAM and CASL](https://acellesend.com/kb/articles/email-consent-and-opt-in-explained.md): What makes email consent valid, single vs double opt-in, the proof to keep, and how GDPR, CAN-SPAM and CASL differ, with the AcelleMail settings. - [Email Deliverability Explained: How Mail Reaches the Inbox](https://acellesend.com/kb/articles/email-deliverability-explained.md): Delivered is not the same as inboxed. What Gmail, Yahoo and Microsoft look at before they file your email, their sender rules, and the AcelleMail settings. - [Email List Quality Explained: Sources, Spam Traps and List Hygiene](https://acellesend.com/kb/articles/email-list-quality-explained.md): Why bought lists fail, how good addresses go bad, the three kinds of spam traps, and the routine that keeps a list clean in AcelleMail. - [Email Marketing Glossary: Terms Every Sender Should Know](https://acellesend.com/kb/articles/email-marketing-glossary.md): Plain-English definitions of email marketing terms you meet in guides, dashboards and reports, the pairs people confuse, and what AcelleMail calls them. - [Email Marketing Metrics Explained: Formulas, Limits and What to Trust](https://acellesend.com/kb/articles/email-marketing-metrics-explained.md): What each campaign rate divides by, why opens and clicks can mislead, the complaint and bounce limits that matter, and how AcelleMail counts. - [Email Sending Explained: SMTP, APIs and Sending Services](https://acellesend.com/kb/articles/email-sending-explained.md): What happens after you click Send: SMTP, reply codes, retries and bounces, SMTP or API, the three ways to send, and the AcelleMail settings. - [Email Tracking and Privacy Explained: Opens, Clicks and Consent](https://acellesend.com/kb/articles/email-tracking-and-privacy-explained.md): How open and click tracking work, why the numbers are not exact, what the 2026 CNIL, Garante and ICO guidance asks, and what to set in AcelleMail. - [GDPR for Email Marketing Explained: What the Law Asks of Senders](https://acellesend.com/kb/articles/gdpr-for-email-marketing-explained.md): What the GDPR and the ePrivacy rules ask of anyone emailing people in the EU: lawful basis, privacy notice, rights, tracking, processors and deadlines. - [How Email Marketing Works, From Signup to Sale](https://acellesend.com/kb/articles/how-email-marketing-works.md): The email marketing cycle in one read: permission, list, message, sending, delivery and measurement, and why each step depends on the one before. - [Sender Reputation Explained: IP, Domain and Warm-up](https://acellesend.com/kb/articles/sender-reputation-explained.md): What mailbox providers mean by sender reputation, IP and domain reputation, what moves it, how to warm up, how to check it, and the AcelleMail tools. - [Spam Filters Explained: How Mail Ends Up in Spam](https://acellesend.com/kb/articles/spam-filters-explained.md): How spam filters decide: blocklists, authentication, content scores and reader feedback, what spam words can do, and how to check an email in AcelleMail. - [Transactional vs Marketing Email: The Difference and Why It Matters](https://acellesend.com/kb/articles/transactional-vs-marketing-email.md): How to tell a transactional email from a marketing one, what the US, EU, UK and Canadian rules ask of each, and why to send them separately. ### [Best Practices](https://acellesend.com/kb/category/best-practices) - [AI-Assisted Email Copy — Without Sounding Like AI](https://acellesend.com/kb/articles/ai-assisted-email-copy-without-sounding-ai.md): AI tools can draft your first version 10× faster. They can also make your copy read like a textbook. This guide is the practical pattern: use AI for the draft, then surgically rewrite for your voice. With before/after examples. - [Email Body Structure — The Hook · Value · CTA Framework](https://acellesend.com/kb/articles/email-body-structure-hook-value-cta.md): A simple 3-part framework that scales from 50-word notes to 500-word deep-dives. Hook earns attention. Value delivers the promise. CTA gets the action. This guide walks each piece with examples and AcelleMail builder integration. - [Email Subject Line Formulas That Work — The Reference List](https://acellesend.com/kb/articles/email-subject-line-formulas-that-work.md): Twelve subject formulas, ranked by reliability across audiences and industries. With examples + when each formula applies + the AcelleMail subject-field walkthrough. - [Re-Engagement Copy That Doesn't Feel Desperate](https://acellesend.com/kb/articles/re-engagement-copy-that-doesnt-feel-desperate.md): Subscribers go quiet. Most senders panic — sending escalating "we miss you!!!" emails. The truth: desperate-feeling re-engagement fails 5× more than honest, confident re-engagement. This guide is the calm-and-confident pattern. - [Subject Line Formulas That Consistently Work — The Testing Discipline](https://acellesend.com/kb/articles/subject-line-formulas-that-consistently-work.md): Stop guessing which formula will work. Test 2-3 per campaign + accumulate evidence. After 10-20 sends, you'll know YOUR audience's sweet spot. This guide is the testing discipline + result interpretation. - [Writing Email for Skimmers — Structure That Survives 5-Second Reads](https://acellesend.com/kb/articles/writing-email-for-skimmers.md): 90% of recipients skim. They read for 5-10 seconds, scrolling fast, looking for the answer. Most emails are written for the 10% who read carefully — they fail with the skimmer majority. This guide is the skimmer-first structure. ### [Troubleshooting](https://acellesend.com/kb/category/troubleshooting) - [Decoding Bounce Messages — Read the Tracking Log Like a Pro](https://acellesend.com/kb/articles/decoding-smtp-error-codes-and-bounce-messages.md): Hard bounces, soft bounces, deferred — what AcelleMail's bounce log is actually telling you, and which bounces you can ignore vs. which need action. Read the UI first, dive into the SMTP codes only when needed. - [Email Delivery Issues — UI Diagnostic Checklist](https://acellesend.com/kb/articles/debugging-common-email-delivery-issues.md): When messages don't arrive — late, bounced, missing entirely — the AcelleMail dashboard surfaces nine signals that tell you whether the issue is sending-side or recipient-side. Walk the checklist, fix from the UI in most cases. - [My Automation Isn't Triggering — How to Diagnose from the UI](https://acellesend.com/kb/articles/why-is-my-acellemail-automation-not-triggering.md): A welcome series or drip that won't fire on new subscribers. The Automations dashboard shows you whether the workflow is active, what trigger it's listening for, and which subscribers are eligible — three checks resolve most cases. - [My Campaign Is Stuck in "Sending" — What to Check](https://acellesend.com/kb/articles/why-is-my-acellemail-campaign-stuck-in-sending-status.md): A campaign that still shows "Sending" hours after you hit send. Walk through the three UI signals that tell you what's actually happening — then the two-click fix that resolves it for most teams. - [My Emails Are Landing in Spam — UI-First Diagnostic](https://acellesend.com/kb/articles/why-are-my-acellemail-emails-going-to-spam-folder.md): Spam-folder placement happens for measurable reasons. Walk the Insights page, the Sending Server config, and the Test diagnostic — three UI checks isolate the cause before anyone has to look at headers. ### [Migration & Comparison](https://acellesend.com/kb/category/migration-comparison) - [ActiveCampaign → AcelleMail Migration — Visual Walkthrough](https://acellesend.com/kb/articles/migrating-from-activecampaign-to-acellemail.md): Export contacts from ActiveCampaign, import into AcelleMail in 6 clicks. UI walkthrough plus optional API migration for large accounts. - [Brevo (Sendinblue) → AcelleMail Migration — Visual Walkthrough](https://acellesend.com/kb/articles/migrating-from-brevo-sendinblue-to-acellemail.md): Export contacts from Brevo, upload to AcelleMail in 6 clicks. UI walkthrough on both sides plus optional API-driven migration for large lists. - [ConvertKit (Kit) → AcelleMail Migration — Visual Walkthrough](https://acellesend.com/kb/articles/migrating-from-convertkit-kit-to-acellemail.md): Export subscribers from ConvertKit (now Kit), import into AcelleMail in 6 clicks. Visual walkthrough on both sides with API-driven option. - [Klaviyo → AcelleMail Migration — Visual Walkthrough](https://acellesend.com/kb/articles/migrating-from-klaviyo-to-acellemail.md): Export your Klaviyo profiles as CSV, import into AcelleMail via the 6-click wizard. Visual walkthrough plus power-user API path for large Klaviyo accounts. - [Mailchimp → AcelleMail Migration — A Visual Walkthrough](https://acellesend.com/kb/articles/migrating-from-mailchimp-to-acellemail.md): Export contacts from Mailchimp's Audience screen, import into AcelleMail in 6 clicks. This guide covers the UI on both sides; advanced API-driven migration in the collapsible section for power users. - [MailerLite → AcelleMail Migration — Visual Walkthrough](https://acellesend.com/kb/articles/migrating-from-mailerlite-to-acellemail.md): Export subscribers from MailerLite, import into AcelleMail in 6 clicks. Visual walkthrough on both sides with API-driven option for large lists. ### [AcelleMail Updates](https://acellesend.com/kb/category/acellemail-updates) - [AcelleMail 2026 Roadmap](https://acellesend.com/kb/articles/acellemail-2026-roadmap.md): Knowing what's coming next in AcelleMail helps you plan — whether to wait for a feature vs build a custom extension, when to upgrade vs hold, how to align your stack roadmap with the product's direction. This article explains the platform's public commitments + how to follow the evolving roadmap + how to influence it. Specific feature lists drift; the meta-process doesn't. - [Community Spotlight: Business Case Studies](https://acellesend.com/kb/articles/community-spotlight-business-case-studies.md): Three composite case studies from the AcelleMail operator community — a digital agency that replaced Mailchimp for 40 clients, an e-commerce store that built a high-converting abandoned-cart sequence, and a B2B SaaS that wired AcelleMail to product-usage data for retention emails. Anonymized + plausible-pattern, with the architecture decisions and the operational realities behind the numbers. - [Contributing to AcelleMail Development](https://acellesend.com/kb/articles/contributing-to-acellemail-development.md): AcelleMail is a commercial CodeCanyon product — not an open-source project with public PRs and a Discord. But that doesn't mean you can't contribute. This guide walks the four real channels that move AcelleMail forward: high-quality bug reports through CodeCanyon support, well-framed feature requests, public knowledge-sharing through case studies + tutorials, and translation contributions. Plus what to expect in response. - [What's New in AcelleMail](https://acellesend.com/kb/articles/whats-new-in-acellemail-52.md): AcelleMail ships updates regularly — minor patches every few weeks, larger feature releases a few times a year. This article explains the release cadence, where to find the current list of "what's new" for your install, the upgrade discipline that keeps things running smoothly, and the patterns of improvement the platform has been heading toward. ## Optional - [/features](https://acellesend.com/features.md): full feature catalog. - [/email-marketing](https://acellesend.com/email-marketing.md): campaign capabilities deep-dive. - [/automation](https://acellesend.com/automation.md): automation engine details. - [/integrations](https://acellesend.com/integrations.md): all integrated services + REST API. - [/security](https://acellesend.com/security.md): security architecture + GDPR posture.