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Horde is both an Open Source software project and an application framework written in PHP.
The application framework is currently the basis for 50 applications written by developers from around the
... [More] world, including the flagship IMP Webmail client, the popular Chora repository viewer, and a complete groupware suite. The guiding principles of the Horde Project are to create solid standard-based applications using intelligent object oriented design, and wide-ranging platform and backend support. There is great emphasis on making Horde as friendly to non-English speakers as possible. The Horde Framework currently supports many localization features such as unicode and right-to-left text, and is shipped with translations in over 40 languages. [Less]
The Apache Java Enterprise Mail Server (a.k.a. Apache James) is a 100% pure Java SMTP and POP3 Mail server and NNTP News server. James is a complete and portable enterprise mail engine solution based
... [More] on currently available open protocols.
James is also a mail application platform. We have developed a Java API to let you write Java code to process emails that we call the mailet API. A mailet can generate an automatic reply, update a database, prevent spam, build a message archive, or whatever you can imagine. A matcher determines whether your mailet should process an email in the server. The James project hosts the Mailet API, and James provides an implementation of this mail application platform API. [Less]
Bongo is an easy-to-use mail and calendar system, offering a simple yet powerful user interface. The goal is to make sharing, organisation, and communication simpler, quicker, and more useful.
Buni is a community of open source software developers and users dedicated to the research and development of communication and collaboration software. Buni offers Meldware Communications Suite with
... [More] Mail, a Calendar Server, Webmail, and a Secure Administration System. [Less]
maildirman copies held messages from Mailman's moderator queues to a Maildir. After you move messages to "spam" and "non-spam" folders, it feeds them through SpamAssassin's Bayesian learner, and tells
... [More] Mailman to discard or accept, as appropriate. This allows you to manage both list moderation and spamassassin training via a local MUA, a standard IMAP client, maildirsync, or any number of other standard mail-handling mechanisms, rather than only through the Mailman web interface. [Less]
We all want spam filtering, I want it on my server, so my webmail is already filtered. I get approximately 2500 spam mails per month, and many more that don't make it through my SMTP front lines. I
... [More] use dspam because it has a much lower footprint than SpamAssassin, and also because it succeeds in catching almost all of my spam with virtually no false positives.
Additionally, most spam filters need training. In order to be able to train with as little overhead as possible, I want to simply be able to move false positives out of the spam folder and false negatives into it. This leads to the concept of integrating the spam retraining process into the IMAP server. [Less]