[TriLUG] Postfix security question

[Jason Tower]

i'm assuming your local users are on the same subnet as the postfix 
server, and therefore are "trusted" (assuming you're using the default 
mynetworks_style = subnet setting in main.cf).

you could try changing this to mynetworks_style = host, which will make 
them untrusted.  then set the relay_domains parameter appropriately so 
they can still send outbound mail (check the commented relay_domains 
section of main.cf for specific info).  please note that i have not 
tried this, just shooting from the hip.

jason

On Wednesday 21 January 2004 11:31, joehome at wisdom.myftp.org wrote:
> Is there anyway to control what domains are allow from the “MAIL
> FROM:me at somewereelse.com?
>
> This is to stop people on my network from possibly sending out mail
> that is not from my domain.
>
> I would like to do this without Cyrus SASL, but from inside postfix.
>
> Thanks in advance,
>
> Joe