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The number one Open Source IMAP and POP3 server for Linux/UNIX operating systems
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The Cyrus IMAP server is generally intended to be run on sealed systems, where normal users are no...
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Qpopper is the most widely-used server for the POP3 protocol.
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Effortless email and collaboration for cloud deployments.
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qmail-smtpd-auth is a patch for qmail that enables it to support SMTP AUTH protocol.