--On 14 May 2006 23:53:46 +0100 Alastair Campbell <ac@???> wrote:
> Jakob Hirsch wrote:
>> Would be better to do that in acl_check_rcpt:
>>
>> deny
>> senders = :
>> ! local_parts = known@??? : another@???
>> message = This address never sends out mail, so it cannot get bounces.
>
> Thanks for the reply Jakob. Are you saying that it would be best to use
> the second option (quoted above), instead of the first, or as well?
The key here is that "senders = :" matches the case where the SMTP envelope
sender (aka MAIL FROM argument, or return-path) is empty. This is NOT a
message header header, but the argument to an SMTP command which precedes
the message header and body.
So, this says to reject bounce messages unless you know that at least one
recipient is valid.
> That second one doesn't seem to identify that it's a bounce, or am I
> misunderstanding?
>
> I also assume that this is the file you mean?
> acl_check_rcpt = /etc/exim4/conf.d/acl/30_exim4-config_check_rcpt
>
> Thanks,
>
> -Alastair
--
Ian Eiloart
IT Services, University of Sussex
