Hello,
I seem to be having a problem with outbound mail. Not all outbound mail. Originally it was just .aol addresses but it seems to be growing. Now having problems with att.net and rr.com addresses. This is running through an Exchange on Server 2003. There is also a Checkpoint N1000W firewall on the system but to the best of my knowledge, it isn't checking outbound.
It seems the problem started after upgrading to U-Verse. Finally figured out port 25 was blocked and got that resolved. I tend to think this is a U-verse problem due to it being selected addresses or ISPs.
Any help would be greatly appreciated.
↧