AfterLogic WebMail Lite PHP is a free AJAX webmail application. Users can receive, view, manage, compose, and send email through web interface (IMAP and SMTP supported). Source code included.
- Supports SMTP/IMAP/Sieve protocols; MySQL database backend
- Address Book
- Integration with cPanel, Plesk, DirectAdmin
- More than 20 translations, easy to add new ones
- Various plugins available, API allows for creating your own extensions
Good for small mailboxes! The approach to fetching mail is clearly not intended for existing large mailboxes: I tried this on a local IMAP account with 200+ folders and 130,000 messages and it cached every single message header upon login before giving access to the interface (this took about 20 minutes, caused the web page to use 500MB memory, and caused the session to timeout). After this initial cache, the application starts a lot quicker on login, but because of the large number of folders to check against the cache, it still delays a bit.