Exim: how to set up an email address?
How can I tell Exim to accept mail to the address
The domain is specified in /etc/exim4/update-exim4.conf.conf like this: dcotherhostnames='example.com'
Debian version 7.5
this link may help:
I use exim4(since lenny) along with sa-exim(spamassasin plugin) and it has worked very well.