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-2.0 Java Communication - Email - Mail Delivery Agents

Homepage

davmail.sourceforge.net

Source code

github.com

Other self-hosted communication - email - mail delivery agents

Cyrus IMAP

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

BSD-3-Clause-Attribution

Dovecot

IMAP and POP3 server written primarily with security in mind.

MIT/LGPL-2.1

Run it with Docker

Spin up DavMail on a VPS in minutes. Use the docker-compose generator to get a starter snippet, or grab a server below.

Generate compose file Browse Communication - Email - Mail Delivery Agents