SquirrelMail is a standards-based Webmail package.It includes built-in pure PHP support for the IMAPand SMTP protocols, and all pages are rendered inpure HTML 4.0 for maximum compatibility acrossbrowsers. It has very few requirements, and isvery easy to configure and install. It has all thefunctionality you would want from an email client,including strong MIME support, address books, andfolder manipulation.License: GNU General Public License (GPL)Changes:
White space wrapping of auto-generatedSquirrelMail option widgets may now be controlled.Matching of alternate identities when replying wasfixed. HTTPS detection under Windows IIS wasfixed, as it was incorrectly setting cookies to betransmitted only over a secure connections whennone existed. An XSS exploit in hyperlinks whenrendering messages was fixed.