relay prevention

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Szerző: Brian Reichert
Dátum:  
Címzett: exim-users
Tárgy: relay prevention
I fear that I'm missing something from the exim documentation about
relaying, and how to control it.

What I want to do:

a) If the sending host is within our domain, accept.

b) If the sending host is without our domain, and the recipient is
within our domain, accept.

Conversely: if neither the sending host, nor the recipient, is
within our domain, reject.

I'm just not wrapping my brain around this issue right... :(

Any pointers, please let me know. I've looked through the Hypermailed
archives, so if you see a meaningful posting there, point me to
it.

-- 
Brian Reichert                        The Internet Company
617-547-3600 x161                    96 Sherman Street
reichert@???                    Cambridge, MA  02140