eMail is a fork of Interlink for IA-32 i686 with more optimizations.
Template generator for (responsive) emails & email signatures
The classic email sending library for PHP
A faster, leaner email client and fork of Nylas Mail
Open source email service with a strong focus on security and privacy
Free and Open Source Invoicing, Expenses & Time-Tracking
Backup Emails from 99+ Email Clients for Free with Just Few Limitation
Simple and elegant invoicing solution
Prometheus Alertmanager
Bitwarden compatible server written in Rust
Open Source Email App for Android
Lightweight Open Source webmail written in PHP and JavaScript
Build and make a full ticketing support system
Create Emails Backup from Any Online Email Account
Unofficial ProtonMail Desktop App
Converts CSS styles into inline style attributes in your HTML code
Matrix reference homeserver
Disposable webmail server (similar to Mailinator) with built in SMTP
Insular email distribution - mail server as Docker images
Best Email Archiving Software For Backup & Migrate 90+ Email Clients
Bojler is an email framework
Fullstack open source Invoicing application made with MongoDB
Automated hacking tool to find leaked databases with 97.1% accuracy
Windows eml and mbox viewer.