Mail Proxy Applications
Lightweight thread library for C/C++ coroutine (similar to goroutine)
Automated hacking tool to find leaked databases with 97.1% accuracy
SMTP email proxy and relay server
Backup Emails from 99+ Email Clients for Free with Just Few Limitation
Download books from the hathitrust website in a fast and easy manner
Universal server
Free Email Backup Software | Email Backup App for Android
URL filter to block unwanted content on the internet
EasyMailer: Bulk Email/SMS Sender Using SMTP
Open source e-mail tracker made with Flask, setup & run in 10 minutes
Zentyal is a Linux Small Business Server
Whonix is an Anonymous Operating System.
TrapGate Mailer
zzBulletin, Open source, Elegant, Powerful Forums.
To synch and encrypt all sorts of data across different sources
Free-SA is report generating tool for web, proxy and mail log files
.NET object oriented encapsulation and access library to Yahoo! Mail
General purpose TCP archiver