Postfix - Postfix is a mail transfer agent (MTA) that routes and delivers electronic mail.

Athena Archiver - Athena Archiver Email Archiving Solutions provide enhanced disaster recovery options by enabling automatic off-site email storage and data replication to a mirror site.

mailcow - An open source mailserver suite.

Archive2Azure - Archive360's email archive solution retains your data in your own cloud tenant. Say NO to proprietary email archive software that own your encryption keys.

Mail-in-a-box - Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

MailShelf Pro - MailShelf Pro is a professional email archiving solution that covers all important aspects of a...