Courier IMAP!

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* Experimental TLS/SSL enhancements which are designed to implement a secure mail delivery channel between trusted domains, over an untrusted network. This is implemented by requiring mail to select domains use TLS/SSL connections which require the remote server to present an X.509 certificate signed by a private (not a public certificate authority. This is pretty much the highest level of security that can be achieved with today's technologies. This doesn't even require DNSsec. Even if the DNS cache is poisoned with MX records that divert mail to a rogue relay, the attacker will not have an X.509 certificate signed by a private CA (this assumes, of course, that the security of the private CA hasn't been breached. This work is mostly complete, but still needs a little testing. * Messag

Courier IMAP alternatives

  • Dovecot

  • Dovecot is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with security primarily in mind. Dovecot is an excellent choice for both small and large installations. It's fast, simple to set up, requires no special administration and it uses very little memory.

    tags: imap imap-server pop3 sftp

  • Cyrus IMAP

  • The Cyrus IMAP server differs from other IMAP server implementations in that it is generally intended to be run on sealed servers, where normal users cannot log in. Users can access mail through the IMAP/IMAP-S, POP3/POP3-S or KPOP protocols. The private mailbox database design gives the server considerable advantages in efficiency, scalability, and administratability.

    tags: imap imap-server mail-server pop3

  • Archiveopteryx

  • Archiveopteryx is an Internet mail server, optimised to support long-term archival storage. It seeks to make it practical not only to manage large archives, but to use the information therein on a daily basis instead of relegating it to offline storage.

    tags: imap mail-server pop3 postgresql sasl

  • DBMail

  • DBMail is a fast, scalable IMAP4 and POP3 server that stores all email and users in a Postgresql, MySQL or SQLite database.

    tags: imap imap-server pop3 pop3-server