How does Atmail compare to other email software?
Atmail includes the full source code, allowing clients to modify features as required without expensive development costs. The interface of Atmail is constantly kept up-to-date with browser enhancements, so that Atmail always offers one of the most attractive and intuitive WebMail interface available. The server backend of Atmail is based on a high-performance SMTP/POP3/IMAP server written in C/C++, using maildir for message storage and MySQL as the database backend for user authentication/settings. The Atmail software has been designed to scale to over 1 million active email accounts.