Web-cyradm is the project that I launched in 2002. It is a webbased administration software for mailservers based on Postfix and Cyrus. All userdata such as e-mail adresses and credentials are stored in a SQL database.
In 2004 more than 24'000 users downloaded a copy of it. This makes it worth for me to work further on it.
The code can be found at https://github.com/web-cyradm/web-cyradm