In trying to send mail to AOL & COMCAST clients, there messages are stuck in the mail queue.
I do not have a problem sending to any other clients.
I do not have a problem in receiving email from anyone.
I just paid $259 .00 to Microsoft Tech Support regarding us not being able to send to AOL clients. Microsoft says the problem is on the AOL end.
Here is the result of a Telnet session:
From our Exchange Server to AOL Server:
From AOL Server to our Exchange Server:
2012-08-22T16:23:20.640Z,Default,08CF49B05FCB83DC,2,192.168.1.253:48192,22.214.171.124:25,<,421 mtain-mc05.r1000.mx.aol.com Service unavailable - try again later,
The error message presented on our Exchange queue says:
451 4.4.0 – Primary target IP address responded with “421 mtain-mc05.r1000.mx.aol.com Service unavailable - try again later”. Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts.
Your help is greatly appreciated.