In one of our affiliate offices in another city, we are seeing this problem. They have an Exchange 2003 SBS server up and running. All mail sent out from it goes out fine and servers get it fine.
But mail coming in to it is currently having issues. Many servers send them mail and it gets through just fine. But there are also relatively many (it is not just an isolated problem) who can't send e-mail.
The ones that we can't receive from don't get any error messages and so far haven't gotten time-out messages either. If the admin on our side up there looks in the Exchange 2003 connections, they can see the server trying to connect to them - they can freeze and force the connection, but the message doesn't get through.
Our server there does not do SPF checks and it is not doing DNS reverse lookups on incoming mail.
I can telnet to port 25 on it from various servers that I have access to and that is fine, and I can send mail through fine as well.
One of the example servers that can't talk to us is an Ernst and Young one - so it isn't exactly a mom and pop sort of thing who is having problems.
I have NEVER seen this issue before, so I have no clue how to resolve it. The manager up there is deciding that yelling at me is currently the best way to resolve it, which is nice.
Can you please offer possible things to check as to what might allow some messages to get through, but not others (the anti-virus is not blocking the messages, we watched that - nor is the anti-spam software, also checked - and the IT person up there can see the servers connected, just no mail ever comes in)
I'm baffled personally.
But mail coming in to it is currently having issues. Many servers send them mail and it gets through just fine. But there are also relatively many (it is not just an isolated problem) who can't send e-mail.
The ones that we can't receive from don't get any error messages and so far haven't gotten time-out messages either. If the admin on our side up there looks in the Exchange 2003 connections, they can see the server trying to connect to them - they can freeze and force the connection, but the message doesn't get through.
Our server there does not do SPF checks and it is not doing DNS reverse lookups on incoming mail.
I can telnet to port 25 on it from various servers that I have access to and that is fine, and I can send mail through fine as well.
One of the example servers that can't talk to us is an Ernst and Young one - so it isn't exactly a mom and pop sort of thing who is having problems.
I have NEVER seen this issue before, so I have no clue how to resolve it. The manager up there is deciding that yelling at me is currently the best way to resolve it, which is nice.
Can you please offer possible things to check as to what might allow some messages to get through, but not others (the anti-virus is not blocking the messages, we watched that - nor is the anti-spam software, also checked - and the IT person up there can see the servers connected, just no mail ever comes in)
I'm baffled personally.