ml ml:
> This setup is not very unusual if you have a lager network. Then you
> have multiple mailout servers for send/deliver the mails.
> How could i possibly control recipients that do not belong to me?!
If your MTA is an outbound relay for an internal network, then you
could certainly require with check_sender_access that the SMTP
sender is an "internal" email address (or <>).
Then, an infected internal machine cannot send out junk with a fake
"external" sender address, and your MTA will not be blacklisted for
sending backscatter email.
Wietse
