On 26/03/2026 12:16, Sad Clouds via Postfix-users wrote: > It looks like there is no AUTH, but for some reason I can still submit > mail on port 25 in some cases. There are two cases I'm testing:
Some while ago, I had a spate of spam messages, addressed to me, and claiming to be from "support" or "accounts" or "personnel" (at) "mydomain". They were coming in - unauthenticated - on port 25. These were caught by placing an entry in the sender_access file, resolving to anything from "mydomain", with an action of "permit_sasl_authenticated, reject" Any legitimate (correctly authenticated) messages passed the test, otherwise they were rejected. Hope this helps Allen C _______________________________________________ Postfix-users mailing list -- [email protected] To unsubscribe send an email to [email protected]
