The above looks nearly perfect for what I want to do - but I need it to only bind to a single IP address and port.
In other words, I have exim bound to all my server IPs on standard ports, but I want to bind SMTP on one IP address to port 80 (because my father's employer, as well as my college, only allow port 80 connections, and thus I can't send email)...
I've read exim documentation, but I don't see how I can bind the above to just a single IP address.
Is it possible?