Citadel/UX (commonly known as Citadel) is an open source, complete and feature-rich collaboration suite (messaging and groupware).
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Category: Internet
Dovecot – IMAP and POP3 email server
Dovecot is a mail server whose major goals are security and extreme reliability. It seeks to handle all error conditions and verify that all data is valid.
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Cyrus IMAP – email, contacts and calendar server
Cyrus IMAP is an email, contacts and calendar server intended to be run on a “sealed” server.
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Courier Mail Server – mail transfer agent
The Courier mail transfer agent is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP.
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Postfix – mail transfer agent
Postfix is a free and open source mail transfer agent (MTA), a computer program for the routing and delivery of email.
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Zimbra – Enterprise Collaboration
Zimbra Collaboration Suite (ZCS) is a groupware product developed by Zimbra Inc. Zimbra consists of both client and server components.
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DBMail – scalable sql based email services
DBmail is the name of a group of programs that enable the possibility of storing and retrieving mail messages from a database.
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OpenSMTPD – daemon implementing the Simple Mail Transfer Protocol
OpenSMTPD is an implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extensions.
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Exim – message transfer agent
Exim is an open source mail transfer agent (MTA), which is software responsible for receiving, routing, and delivering e-mail messages.
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rdesktop – remote desktop client
rdesktop is an open source client for Windows Terminal Services, capable of natively speaking Remote Desktop Protocol to present the user’s Windows desktop.
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