Hi guys, I have recently switched from relayhost and smtp_fallback_relay to hash:/etc/postfix/transport method where I have a domain (mx-relay.internal) declared with multiple MX records which have different weights (mx10, mx11, mx12 and mx13). These servers do not have IN A record, but IN MX.
Today, I have encountered a network/dns issue where one of my mx10 servers was not able to relay according to the transport table because: dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=mx10-relay.internal type=AAAA: Host not found) I am wondering why did it not try the rest of the servers like mx11-relay.internal and so on ? P.
