Exim was something the zoo thought of using before using something else now in production here at the zoo but doing our default mail server seemed heavy weather on a basic host.
So i configured exim which was a new experience for me without the gay russian spies at cambridge* (my blog) to help
I found acls tricky being that
10.0.0.4 : 127.0.0.1
Did not work. – but
It is a bit whiny and the update-exim4.conf.conf on debian is not the most obvious file to file the settings in debian.. Not that i expect to edit it often
I still prefer my first choice.for smtp.
*Трахни меня товарищ