We are unable to receive emails from some domains like aol(sometimes), Gmail, and other domains.
But we are able to sent emails to the domains, the Reports from pingability.com mxtoolbox.copm and dnsstuff.com show all the DNS Settings OK.
I'm using wireshark and I can see there's a connection timeout , I increased the smtp connection timeout but still having the issue...
Exchange 2003 spack 2 runing on windows 2003 network.
I have the Exchange/SPAM feature disable.