More detail, please, about transport rules.
From: jeroen <jer...@adaptr.nl> Date: Thursday, July 22, 2021 at 14:44 To: Daniel White <daniel.e.wh...@nasa.gov> Subject: [EXTERNAL] RE: How do I tell a relay to relay ? Make sure mydestination is set to empty, and configure transport rules to deliver to your mda. -------- Oorspronkelijk bericht -------- Van: "White, Daniel E. (GSFC-770.0)[NICS]" <daniel.e.wh...@nasa.gov> Datum: 22-07-2021 20:35 (GMT+01:00) Aan: Postfix users <postfix-users@postfix.org> Onderwerp: How do I tell a relay to relay ? Server 1 - MTA - Relay only - Postfix, Amavis, Spamassassin, Clam AV - No local or virtual mail users on this server. Server 2 - MDA - Where the Mailboxes Live - Postfix, Dovecot, RoundCube, PostfixAdmin - All mail users are virtual. Mail sent to the MTA wants to deliver to a local user on MTA rather than relaying to MDA. We get the “User unknown in local recipient table” error, which makes sense. What are the configuration settings that we have obviously missed that will send the mail to MDA and NOT try to deliver mail locally on MTA ?
