SquirrelMail is a standards-based Webmail package. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages are rendered in pure HTML 4.0 for maximum compatibility across browsers. It has very few requirements, and is very easy to configure and install. It has all the functionality you would want from an email client, including strong MIME support, address books, and folder manipulation.
@greyhairweenie - sounds like you might have another client accessing your mailbox at the same time doing the filtering. If it is SquirrelMail doing that, you'll need to find the filtering rul...
@sirmafia -- SquirrelMail has a plugin that can interface with most quota systems. However, keep in mind that it's your responsibility to build a quota system into your mail server first -- Sq...
@rjrsousa -- SquirrelMail is an IMAP client, and IMAP servers can have all kinds of email account systems behind them. The beauty of SquirrelMail is that it works with ANY such system, but that...