Hi, I am not sure if I am posting in the right section but I have a little problem with NAT I believe.
Basically the problem that I have is that I have a new Exchange server sitting on 192.168.12.2 IP address and on the router I have this NAT enabled
ip nat inside source static tcp 192.168.12.2 110 212.115.5.5 110 extendable
ip nat inside source static tcp 192.168.12.2 25 212.115.5.5 25 extendable
The Exchange can receieve emails but it will not send them. It cannot make connection to any of the smart hosts on port 25 or can't even send mail using DNS. When I run telnet my.smarthost.com 25 it will not connect but if I run that from the router then it connects fine.
Any ideas what I should do or what it could be?
Many thanks