[Mimedefang] MX -> 127.0.0.1

[Kevin A. McGrail]

> } However, right now, I am thinking I should be able to do the invalid
helo
> } and invalid MX check in filter_sender since I have $sender and that's
all I
> } need.  If I reject in filter_sender, I haven't received the entire email
yet
> } and it isn't a very "costly" transaction.
>
>      If you do the test in filter_sender() then a discard would
> definitely be more expensive since that would force you to receive the
> message; whereas with a reject you wouldn't even have to look at the
> recipients much less receive the message.

I am looking more towards using these tests in filter_sender and if they
fail, to return a 5XX level Rejection for Invalid MX Record so I think we
are on the same page.

Regards,
KAM