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Acellemail

SPF Record Deep Dive — Mechanisms, Limits, and Edge Cases

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.

May 19, 2026 7 min read Advanced Acellemail 3 11

DNS & Domain Setup

DMARC Enforcement Migration — From p=none to p=reject in 90 Days

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.

May 19, 2026 2 min read Intermediate Acellemail 3 9

DNS & Domain Setup

BIMI with VMC — Cost, Process, and Whether It's Worth It

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...

May 19, 2026 3 min read Advanced Acellemail 4 14

DNS & Domain Setup

Custom Tracking Domain — Multi-Vendor Rotation, HTTPS, and Per-Region Setup

You've set up a custom tracking domain. Now scale it: multiple tracking domains for reputation isolation, HTTPS enforcement, multi-region routing, programmatic verification. This is the advanced companion to the basic setup guide.

May 19, 2026 6 min read Advanced Acellemail 5 13

DNS & Domain Setup

Return-Path and Envelope-Sender — Quick Setup in AcelleMail

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...

May 19, 2026 5 min read Beginner Acellemail 3 8

Installation & Setup

Install AcelleMail on Ubuntu 24.04 LTS

Ubuntu 24.04 LTS ("Noble Numbat") is the recommended host for a 2026 AcelleMail install. PHP 8.3 in universe, MySQL 8.0 from the official repo, supported until April 2029. This guide walks the install end-to-end — from a freshly-provisioned...

May 19, 2026 13 min read Intermediate Acellemail 3 7

Installation & Setup

Install AcelleMail on Debian 12 (Bookworm)

Debian 12 ("Bookworm") is the lightest-weight production host for AcelleMail — same Linux family tree as Ubuntu, fewer pre-installed surprises, supported through 2028 (and through 2033 with Freexian ELTS). This guide covers the three meanin...

May 19, 2026 10 min read Intermediate Acellemail 2 7

Installation & Setup

Install AcelleMail on Rocky Linux 9

Rocky Linux 9 is the community RHEL 9 rebuild — the right choice when your operations policy requires a Red Hat-family OS without paying for a RHEL subscription. CentOS Stream 9 and AlmaLinux 9 work identically. The four big differences fro...

May 19, 2026 11 min read Intermediate Acellemail 5 9

Installation & Setup

Install AcelleMail on a DigitalOcean Droplet

DigitalOcean is one of the friendlier ways to run AcelleMail in production — cheap droplets, simple console, and a managed Cloud Firewall that keeps SMTP exposure honest. This guide walks the DigitalOcean-specific bits end-to-end: droplet s...

May 19, 2026 12 min read Intermediate Acellemail 7 17

Installation & Setup

Install AcelleMail on AWS EC2

AWS EC2 is the right AcelleMail host when (a) you already operate on AWS and want to consolidate, (b) you want SES on the same network plane for sub-millisecond API latency, or (c) you need a specific region/VPC posture. The trade-off vs Di...

May 19, 2026 12 min read Advanced Acellemail 4 15

Installation & Setup

AcelleMail Post-Install Hardening Checklist

A fresh AcelleMail install is functionally complete the moment the web installer turns green — but it isn't yet production-grade. The default leaves easy-to-fix exposures: SSH password auth on, no fail2ban, no automated backups, no monitori...

May 19, 2026 13 min read Intermediate Acellemail 8 15

Sending & Deliverability

IP Warmup by ISP — Per-Receiver Ramp Strategy in AcelleMail

Gmail accepts new IPs faster than Microsoft. Yahoo is slower than both. Apple iCloud is the strictest. A uniform warmup misses these per-receiver curves. This guide segments your warmup by recipient ISP for faster reputation building.

May 19, 2026 7 min read Advanced Acellemail 5 13

Sending & Deliverability

Domain Warmup — Building Reputation on a New Sending Domain

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 w...

May 19, 2026 7 min read Intermediate Acellemail 4 7

Sending & Deliverability

Feedback Loops (FBL) — Setup + Wire in AcelleMail

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. Th...

May 19, 2026 7 min read Intermediate Acellemail 2 9

Sending & Deliverability

Sender Reputation Monitoring — What to Watch in AcelleMail

Three numbers tell you everything: bounce rate, complaint rate, and inbox placement. AcelleMail surfaces all three in the campaign report and sending-server panels. This guide walks where each one lives + when to act on it.

May 19, 2026 6 min read Intermediate Acellemail 7 19

DNS & Domain Setup

Return-Path vs Envelope-Sender — What Each Does in AcelleMail

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.

May 16, 2026 6 min read Intermediate Acellemail 7 15

Email Marketing

Campaign Scheduling and Timezone Optimization in AcelleMail

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.

May 13, 2026 4 min read Beginner Acellemail 2 9

Automation

Post-Purchase Follow-Up Automation in AcelleMail — Thank, Review, Cross-Sell

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 cu...

May 13, 2026 7 min read Intermediate Acellemail 3 10

Best Practices

Email Subject Line Formulas That Work — The Reference List

Twelve subject formulas, ranked by reliability across audiences and industries. With examples + when each formula applies + the AcelleMail subject-field walkthrough.

May 11, 2026 7 min read Beginner Acellemail 4 12

Integrations

Zapier Integration Guide for AcelleMail

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), an...

May 9, 2026 9 min read Beginner Acellemail 4 8

SaaS & Multi-tenant

Setting Up AcelleMail as a SaaS Platform

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 L...

May 8, 2026 11 min read Advanced Acellemail 5 12

Email Marketing

A/B Testing Email Subject Lines for Better Open Rates

A/B testing the subject lifts open rates 10-30% sustainably. AcelleMail's built-in A/B feature splits your list, picks the winner automatically, ships the winning variant to the rest. This guide walks the setup + the discipline that makes t...

May 7, 2026 7 min read Beginner Acellemail 2 5

Security & Compliance

CASL Compliance in AcelleMail: What Canadian Senders Need

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...

May 5, 2026 5 min read Intermediate Acellemail 6 13

Email Marketing

RSS-to-Email Campaigns in AcelleMail — Auto-Send Your Blog Posts

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.

May 1, 2026 6 min read Intermediate Acellemail 2 7

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