Thomas Nagel:
> But when I send a mail with userpart that doesn't exist - even though it
> is sasl-authenticated - It does not go into amavis which is much clever,
> because it shouldn't go there since your don't need to do spam-filterin
> if the recipient domain does not exist or the user does not exist.
The unknown recipient test is unconditional.
permit_sasl_authenticated causes Postfix to skip other tests (in
smtpd_recipient_restrictions, etc.), but the unknown recipient test
still happens.
This is safe because the unknown recipient test usually does not
depend on some remote DNS server on the far side of the Internet.
It usually relies only on local information.
On the other hand, a remote domain lookup tempfails all the time.
Wietse
