Courier is a mail transfer agent (MTA) and groupware server. It implements IMAP, ESMTP, POP3, LDAP, SSL, HTTP, iCal. It also provides mailing list management, filtering, maildirs storage, and a webmail interface with calendaring and scheduling.
Elm Millennium Edition 2.5 (or Elm ME+ 2.5) is based on Elm 2.4 and incorporates some code from Elm 2.5. It contains enhanced MIME and character set support. A subset of UTF-8 (Unicode) is handled. It can read mail from a local mbox and POP or IMAP folders and can pass mail to the PGP or GPG programs. It can also view digests as a mailbox and reassemble fragmented (message/partial) messages. It includes modules for TLS/SSL, iconv, resolv, and SMTP.
SOGo is a fully supported and trusted groupware server with a focus on scalability and open standards. SOGo is released under the GNU GPL/LGPL v2 and above. SOGo provides a rich AJAX-based Web interface and supports multiple native clients through the use of standard protocols such as CalDAV, CardDAV and GroupDAV, as well as Microsoft ActiveSync. SOGo is the missing component of your infrastructure; it sits in the middle of your servers to offer your users a uniform and complete interface to a
Elm 2.4ME+ is based on Elm 2.4. It contains enhanced MIME and character set support. It can read mail from a local mbox and POP or IMAP folders and can pass mail to the PGP or GPG programs. It can also view digests as a mailbox and reassemble fragmented (message/partial) messages. It includes modules for TLS/SSL, iconv, and SMTP.
Jaro Mail is an integrated suite of interoperable tools for GNU/Linux and Apple/OSX to manage e-mail communication in a private and efficient way, without relying too much on on-line services, in fact encouraging users to store e-mail locally. Rather than reinventing the wheel, Jaro Mail reuses some existing free and open source tools working since more than 10 years, generating their configurations and setting up integrations automatically.
GoldBug is a secure communication suite offering an E-Mail-Client, an Instant Chat Messenger, Filetransfer and a P2P Websearch within decentralized URL-Databases. Every of your transfers is multi-encrypted by default. ● English User Manual: https://en.wikibooks.org/wiki/Goldbug ● Deutsches Benutzer-Handbuch: https://de.wikibooks.org/wiki/Goldbug ● http://marjorie-wiki.de/wiki/GoldBug_(Instant_Messenger%29 COMPILE from source: https://github.com/textbrowser/spot-on
Admin4 is a broad server management tool. It has plugins for maintaining LDAP directories, BIND DNS zones, IMAP servers and PostgreSQL databases. It's a Python and wxWidgets control center, for customization and easier addition of new plugins.
Cascade is a small Python utility to copy emails between IMAP servers.