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Managing the OneOffice Mail Server


OneOffice comes with a full-featured standards-compliant email server.

Much of this section only applies to you if you are a Business Plan customer with your own email server.


The integrated OneOffice Email Server UI allows administrative work on your mail server instance as well as separated domain administrator and mailbox user access:

  • DKIM and ARC support
  • Black- and whitelists per domain and per user
  • Spam score management per-user (reject spam, mark spam, greylist)
  • Fuzzy-logic and AI-basic Spam learning
  • Allow mailbox users to create temporary spam aliases
  • Prepend mail tags to subject or move mail to sub folder (per-user)
  • Allow mailbox users to toggle incoming and outgoing TLS enforcement
  • Sync to migrate or pull remote mailboxes regularly
  • 2FA: Yubikey OTP and U2F USB (Google Chrome and derivatives only), TOTP
  • Add domains, mailboxes, aliases and domain aliases
  • Add whitelisted hosts to forward mail to mailcow
  • Add Fail2ban-like integration
  • Quarantine system
  • Antivirus scanning including macro scanning in office documents
  • Integrated basic monitoring