Hi all, I know this isn't a microsoft exchange forum, but I was hoping maybe someone could help me eliminate any potential configuration problems with postfix IRT the error I'm seeing on my exchange transport server.
Disclaimer: I'm a complete noob with postfix. And pretty noobish at Exchange. Ok, here it is: I have a postfix server relaying email between two domains. Both domains are using exchange 2019. Default receive connectors in both domains are set up to use mutual auth TLS and exchange server authentication, with the "exchange servers, legacy exchange servers, and exchange users" permissions groups. TLS is working and emails are forwarding to the right locations, both from accounts on the postfix server itself and domain to domain. Also, email is working fine from domains to accounts on postfix server. No errors seen in the maillog on the postfix server, getting a trusted TLS connection to each edge transport server and getting a "mail queued for delivery" response from the edge transport servers when I send mail. The problem is, emails to the domains are sitting in the edge transport server queue with the error "A matching connector cannot be found to route the external recipient." Message source name is "Default internal receive connector." I have a valid send connector configured, the postfix server, and as mentioned emails are sending to accounts on that server fine. Does anyone know what can cause this? Is it an authentication problem? Are there any commands I can run on the postfix side to help troubleshoot this? Thanks, and sorry if this isn't the right place to post this. -- Sent from: http://postfix.1071664.n5.nabble.com/Postfix-Users-f2.html
