SquirrelMail [SEP] license
is written in C and is primarily made to provide stateful connections for stateless webmail client software to an IMAP server, thus avoiding new IMAP logins for every client action and in some cases significantly improving webmail performance.
Both SquirrelMail products are free and open-source software subject to the terms of the GNU General Public License (GPL) version 2.
SquirrelMail webmail was included in the repositories of many major GNU/Linux distributions
and is independently downloaded by thousands of people every month.
Platforms.
SquirrelMail webmail
SquirrelMail webmail outputs valid HTML 4.0 for its presentation, making it compatible with a majority of current web browsers. SquirrelMail webmail uses a plugin architecture to accommodate additional features around the core application, and over 200 plugins are available on the SquirrelMail website.
The SquirrelMail IMAP proxy server product was created in 2002 by Dave McMurtrie while at the University of Pittsburgh (where it was named "up-imapproxy", although it has become more commonly known as "imapproxy") and adopted by the SquirrelMail team in 2010. It