Home / communication-email-mail-delivery-agents / Cyrus IMAP

2 self-hosted alternatives to Cyrus IMAP (2026)

Email (IMAP/POP3), contacts and calendar server.

License: BSD-3-Clause-Attribution · Language: C source code

DavMail source

POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client with an Exchange server, even from the internet or behind a firewall through Outlook Web Access.

GPL-2.0Java

Dovecot source

IMAP and POP3 server written primarily with security in mind.

MIT/LGPL-2.1C/deb

All 3 apps in communication-email-mail-delivery-agents →