Dnia 17.04.2023 o godz. 19:59:48 Tyler Montney via Postfix-users pisze: > And that's a definition I've been struggling with: What is *local* in > relation to SMTP?
By "local", I mean here the domains for which that particular server is the final destination, ie. the mail delivered locally and the server "knows" what to do with it. Note that the term "delivered locally" is quite broad and may include *forwarding* the mail to other servers, eg. by aliases defined locally on the server. But still, the mail *is* delivered locally, it just happens to be delivered to an alias that forwards it elsewhere. In terms of Postfix, I interpret the term "local" in the meaning I used above as everything that is not in the default domain class (see http://www.postfix.org/ADDRESS_CLASS_README.html ), ie. all domains for which the server is configured to "handle" mail somehow. We can discuss if this description includes relay domain class, but it definitely (at least for me) includes local domain class, virtual alias domain class and virtual mailbox domain class. > What if I'm a managed service provider hosting email on Postfix? Are all my > customers considered local? In the meaning above, yes. They are all hosted on that server, so they are local. The "operational" difference between local and non-local is simple for me: - mail for all local domains coming in on port 25 should be accepted (of course considering all usual restrictions - the recipient exists, the sending IP is not on a blacklist etc.) - mail for all non-local domains coming in on port 25 should be outright rejected with "Relay access denied" (or similar) message. There is no authenticated submission on port 25. -- Regards, Jaroslaw Rafa r...@rafa.eu.org -- "In a million years, when kids go to school, they're gonna know: once there was a Hushpuppy, and she lived with her daddy in the Bathtub." _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
