Hi...We have three exchange servers 2010 SP3. CAS/HT/MBX role installed on these three servers. No Edge Transport server. Mails are directly going outside from HT servers.
But we have observed that two servers are participating to send mail outside (internet) but third server is not. All three servers are added as 'Source server"
How we can rectify this issue on 3rd server, how we can telnet internet domains, is this is natting issue with public IP.