AcelleMail Knowledge Base

Best Practices

Email Subject Line Formulas That Work

Proven subject line templates and psychological triggers to boost your email open rates.

Guide 2 min read Dec 26, 2025

Sending & Deliverability

How to Set Up SPF, DKIM, and DMARC Records

Complete guide to configuring email authentication DNS records for maximum deliverability.

Tutorial 2 min read Dec 24, 2025

Analytics & Reporting

Understanding Email Open Rates in the Age of Apple MPP

Apple Mail Privacy Protection inflates open rates by pre-fetching images. Learn what MPP is, how it affects your data, and which metrics to focus on instead.

Guide 4 min read Dec 19, 2025

Email Design & Content

Dark Mode Email Design

Design emails that look great in both light and dark mode using CSS media queries and tested fallbacks.

Tutorial 1 min read Dec 13, 2025

AcelleMail Updates

What's New in AcelleMail 5.2

AcelleMail 5.2 ships AI-assisted writing, improved segmentation, and a refreshed template library.

Announcement 2 min read Dec 11, 2025

Installation & Setup

Installing AcelleMail on Ubuntu 22.04

Complete installation guide for AcelleMail on a fresh Ubuntu 22.04 server with Nginx and MySQL.

Tutorial 2 min read Dec 11, 2025

Analytics & Reporting

Email ROI Calculation: Measuring Campaign Profitability

Calculate the real return on investment from your email campaigns, including revenue attribution, cost per send, and lifetime value modeling.

Guide 4 min read Dec 11, 2025

List Management

Double Opt-In vs Single Opt-In: Which to Choose

Compare single and double opt-in signup flows, understand the GDPR implications, and learn when each approach makes sense for your email program.

Reference 3 min read Dec 08, 2025

Security & Compliance

CAN-SPAM Compliance Checklist

Seven CAN-SPAM requirements every US email sender must meet — with concrete examples for each.

Guide 2 min read Dec 07, 2025

Security & Compliance

Data Encryption for Self-Hosted Platforms

Secure subscriber data at rest and in transit on your self-hosted AcelleMail instance.

Guide 1 min read Dec 07, 2025

List Management

Email List Hygiene: Clean Your List for Better Deliverability

A dirty email list harms your sender reputation and inbox placement. Learn how to remove bounces, verify email addresses, and re-engage inactives systematically.

Guide 4 min read Dec 04, 2025

Server Management

Redis for Queue Processing

Replace the default database queue driver with Redis for faster, more reliable campaign processing. Covers install, Laravel config, and queue monitoring.

Tutorial 1 min read Dec 01, 2025