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Last update: 2021-10-15


Manage email routing and protect domains and mail servers. You can configure SMTP/S, POP/S, and IMAP/S policies with spam and malware checks, data protection, and email encryption.


MTA mode is available only with the following models and higher: XG105, Cyberoam CR25iNG, SG105.

SMTP deployment mode

You can configure Sophos Firewall in the following modes:

  • MTA mode: Acts as a mail transfer agent (MTA) that routes and relays emails. You can view the mail spool and mail logs.
  • Legacy mode: Acts as a transparent mail proxy that forwards emails.
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