I have a server 2003 SBE running my Exchange 2003 server, along with AD, DHCP, and DNS.
The issue at hand is as follows, if I send and an email over 1mb in size to domain1.com it will sit in the queue and 9 times out of 10 it will time out, but if i send that same domain1.com an email under 1mb in size it shoots right through the system. I have done quite a bit of testing on this and still cant figure out why it is not working. I have sent a 5mb message to multiple domains including domain1.com all but the one to domain1.com goes through.
I know they guy that is running the other exchange box so I have been working with him directly on this. we have ruled out his server, as we can send the same email from a Hotmail account with no delay. I am getting no errors, other then the error for the time out. We have opened both server to allow send/recv of anything and this issue is still there.