Sophos Sophos Firewall (email alerts and reports): OAuth 2.0 and Microsoft 365 SMTP AUTH
Status: OAuth available
Supported. For most installations this is a configuration change rather than a migration, and no relay is needed.
What the vendor says
Sophos publishes an official guide ‘Configure OAuth 2.0 on Microsoft 365’ for Sophos Firewall 22.0: register the firewall as an app in Microsoft Entra, add delegated SMTP.Send + offline_access permissions, turn on Authenticated SMTP for the sending user, and configure notifications with client ID / secret / refresh token. Confirms Modern (OAuth 2.0) SMTP AUTH support; availability depends on the firewall version.
Read the vendor’s statement in full
Everything on this page comes from that document. If it and this page disagree, the vendor is right and this page is out of date — say so.
Models named in the advisory
Sophos Firewall 22.0Sophos Firewall 20.0
A model missing from this list is not automatically safe. Vendors publish headline lists; regional variants and OEM rebadges drift away from them.
What to do
Follow the vendor’s instructions above. Come back here only if the device turns out to be on an older firmware branch than the one the document assumes.
Sophos entry contributed by @TrueFurina in #310.
Related
- What the error message means — if the Sophos device is reporting a code rather than a sentence
- The full compatibility list — every vendor, in one table
- Setup by printer brand — where the SMTP fields actually live in each vendor’s interface
Last reviewed 2026-08-27. Source: data/devices.json.
Updated 27 Aug 2026