[exim] Accepting messages to certain transport by authentica…

Hello,

I'm creating a message gateway that pipes messages to a system command
for further process. This is done by a special transport in exim
configuration, where all messages sent to a certain domain are routed. I
would like to create a configuration that accepts messages to this
router/transport only if
a) the SMTP user has authenticated (and if possible, only as a certain user)
b) the SMTP connection comes from a certain domain or domains

What would be the best way to carry out such a configuration?

Thanks for advice!

Ville Mattila
Ikaalinen, Finland