We were on a UTM and authenticated relay worked fine.
Migrated to an XG and email flows, but neither myself, nor Sophos support seems to be able to get SMTP Authenticated relay to work.
Environment:
Sophos XG in MTA mode. - Works fine in all respects, other than Authenticated SMTP relay. It does successfully relay from whitelisted internal IPs (MFP, etc)
Exchange 2016 on-prem server - Patched to CU22, including KB5007409 - All aspects working fine.
Active Directory users imported successfully or local users. (I have both and either would be fine)
Spent time with a tier 1 support person (3.5 hours) working through it and was told that "SMTP relaying via AUTH was broken in fw 17, but supposed to be fixed in 18, but it's still broken."
Fantastic. Before I throw a wobbly, is this accurate?
Did Sophos break AUTH relay and leave it broken across multiple versions?
Does anyone have Authenticated (username and password) SMTP relaying working with an on-prem Exchange Server and the XG in MTA mode?
Thanks!
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