Hi all, I have added a Microsoft MN500 router to my network. After this happened, mail can no longer be sent or received from the server. The server is obtaining an ip address from the router and internet connectivity works fine. When I try to send an email to the domain from Yahoo, here is what I get...
Message from yahoo.com.
Unable to deliver message to the following address(es).
18.104.22.168 does not like recipient.
Remote host said: 550 5.7.1 Unable to relay for
Giving up on 22.214.171.124.
The items I send just stay in the outbound queue. I have opened up ports 25, 110, and 53 for both TCP and UDP traffic, as well as place the internal IP of the server in the DMZ zone. I do not know what else to do. Does anyone have any suggestions?