Cyrus IMAP source
Email (IMAP/POP3), contacts and calendar server.
Home / communication-email-mail-delivery-agents / Dovecot
2 self-hosted alternatives to Dovecot (2026)
IMAP and POP3 server written primarily with security in mind.
Home / communication-email-mail-delivery-agents / Dovecot
IMAP and POP3 server written primarily with security in mind.
Email (IMAP/POP3), contacts and calendar server.
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.