I just installed a new SBS2011 server into a network with ISA Server. (Taken it over, not our initial setup).
The old SBS was configured with ISA Server and two NIC's. The internal IP range is 172.16.0.0
I have configured the new SBS2011 with the name 'SERVER01' and an IP of 172.16.0.50 and the previous SBS/ISA/Exchange server is listening on 172.16.0.1.
The end-result is to rip out ISA completely and implement a hardware firewall - but for now - I want to avoid complete carnage and phase it out gently!
I created a new mailbox called 'Test' on the new SBS2011 Server on a fresh MailboxDB. I then attempted to send a test email from 'email@example.com' to 'firstname.lastname@example.org' and it's stuck in the outgoing queue...
I'm stumped! I can send from the SBS2011 mailbox fine, but receiving is a no-no. I haven't even bothered attempting to receive from the internet yet, as if internal doesn't work I doubt much else will.
I've allowed all traffic between 172.16.0.1 & 172.16.0.50 through ISA server, and I can telnet to port 25 from each exchange server.
Thanks in advance