Dear Colleagues, for some reason my relay sever is not able to relay messages to the next hoop. Maybe somebody would be able to support me here.
In the Postfix Log I found this: Dec 8 13:47:15 ismtp01 mail.info: "postfix-outgoing-25"/smtp[5982]: 51808B1C: to=<alex.ma...@domain.fr>, relay=none, delay=0.03, delays=0.01/0.01/0.01/0, dsn=4.4.3, status=deferred (Host or domain name not found. Name service error for name=domain.fr type=MX: Host not found, try again) What I`m planning to do ? I would like to transfer message from our MS Exchange server to the external SMTP gateway: It looks like this: msexch(LAN) --- > Relay01(LAN) ---> Relay02(LAN) ---> Gateway(DMZ) ----> customer(domain.fr) In this scenario only GatewayDMZ is able to resolve MX records from the internet. If only GatewayDMZ is able to resolve MX records why I see that error on the first relay server - Relay01 ? On Relay01 I have configured /etc/postfix/transport file like this: domain.fr relay:Relay02 Why in that case I see that error ? I will really appreciate for any advice. Cheeers Zalezny
