I'm having issues with our exchange 2010 server not being able to receive emails. Sending emails works without any issues. Here is the breakdown.
-A fresh install of Exchange 2010 running on server 2008 R2 on a stand alone box.
-We do not run Edge in our environment
-Domain is a fresh build, standalone, does not have any trusts configured.
-Event logs for DC's and Exchange server is clean. No warnings or errors whatsoever.
-DNS is resolving everything without any issues
-BPA comes back clean
-Transport Connectors are configured correctly (as far as I know).
-All external mail comes through our fortimail, and is being handed off to the exchange server via port 25.
-I've verified that our spamfilter (IE fortimail) is getting the emails, allowing them and is forwarding them to the exchange server.
-Sending emails internally and externally all work without a problem. It's only when receiving from outside of the organization.
- I get the following error kicked back to me:
----- Transcript of session follows -----
<firstname.lastname@example.org>... Deferred: Connection timed out with company.com.
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old
Final-Recipient: RFC822; email@example.com
Remote-MTA: DNS; company.com
Let me know if you need any more information.