Using two servers with NLB, each box contains IIS and a mail server. Server1 is the primary Server2 runs the backup mail server
The problem is the web app sends email to ourselves. When mail is sent from Server2 (via its own SMTP server) to ourselves, it tries to contact Server1, as its the mail server IP. But under Unicast mode of NLB, it cant reach the host via the public dedicated IP address.
How can we get round this?