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Vpopmail is a set of programs for creating and managing multiple virtual domains on a qmail server, with full support for many POP/IMAP servers. A web interface to vpopmail called QmailAdmin is on SourceForge as well.
PAM module that authenticates against a remote IMAP or IMAPS server. Supports multiple servers, SSL, password caching, user blacklists, and many configuration abilities.
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An advanced qmail distribution based on qmail-sql which has SMTP, SMTPS, POP3, POP3S, IMAP, IMAPS services, a content scanner, spoofing protections, SMTP AUTH support, SMTP-after-POP/IMAP, PHP5 API, SPF support and much more...
Linux Monitor is system monitoring software for linux. Linux Monitor has client and server programs to monitor remote services(HTTP,SMTP,IMAP and NNTP). All "errors" are stored to database and viewed using cgi-scripts.
MailDB adds a database back-end to an IMAP server for features such as "virtual" mail folders (msgs appearing in multiple folders), "view" folders (dynamic results of searches), etc. The DB is inherently multi-user, allowing msg reference counting.
IDMS DBMA is an effort to develop a highly scalable (c10k complient) plugin based mail agent aimed at fighting spam & viruses. Hopefully replacing hard-to-maintain, complex, resource hungry configurations used by small to large users today.
Faces - a Gtk+ program for monitoring a list (typically mail
incoming messages) visually. It supports IMAP and POP mailboxes.
There is a huge collection of picons (personal icons) that can be
used in conjunction with the faces program.
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