sip writes:
Am I going to have to do a
search("^From:.*@my.domain.com")) and then
proxy_authorise and check from... essentially only authenticating users who
claim to be from my system?
there is even a function to check if from host is local to your proxy.
I'll give it a shot. Seems kind of backward,
though.
another option is to use pki certificates that both UAs can verify, but
i haven't seen those implemented in UAs.
-- juha