A private open source email server provides unlimited configuration, customisation and users, with no additional cost per user and mailbox size up to the available storage.
- DKIM signed email
- DNSBL Blocklists
- RHSBL Blocklists
- URIBL Blocklists
- Whitelist / Blacklist
- Greylisting
- Spam and Virus filtering
- GeoIP filtering
- Multi-domain
- SSL Encrypted IMAP + SMTP + POP3
- TLS transport to remote SMTP hosts
- SSL Webmail with DAV integration of Calendars, Contacts, Tasks
- Server Sieve email filtering.
- Letsencrypt SSL Domain Verification Certificates
