J David:
> On Tue, Sep 29, 2020 at 2:15 PM Wietse Venema <[email protected]> wrote:
> > One alternative is to set reject_unverified_recipient
>
> Thanks, I will give this a shot and see if it helps our situation.
>
> > Alternatively, if the IP address range is known, check_sender_mx_access
> > will control access by MX record (or A record if the domain has no
> > MX record).
>
> This seems to have the same issue as Bill's suggestion of
> check_sender_a_access; it's acting on the sender, not the recipient.
Then use check_recipient_mx_acces?
Wietse
> While the problem messages I'm trying to catch have the same sender
> and recipient, other messages with those senders do have valid
> recipients, so we can't select purely on sender due to the resulting
> false positives. Sorry, I should have clarified that in the original
> message.
>
> (Blocking messages based solely on having a sender that can't receive
> mail, while IMO a very reasonable thing to do, would cause immediate
> and severe blowback for us.)
>
> Hopefully reject_unverified_recipient will cover us.
>
> Thanks!
>
