I have a 515 configured to pass port 25 from the DMZ to a mailserver on the inside interface.
I am able to telnet(port25) into a mailserver in the DMZ from the outside and inside interfaces.
My issue is that I have a problem connecting to the mailserver on the inside from the DMZ. A connection appears to be made but is dropped immediately. A debug shows port 25 traffic being passed from the DMZ to the inside and back again. I do not know why the connection is not being maintained. I am using statics/acl's and I belive the config is correct.
Thanks