Ian P. Christian wrote:
> On 9 April 2010 22:36, W B Hacker <wbh@???> wrote:
>> # CONNECT_3B If a PTR RR was not found, we don't get this far.
>> # If a PTR exists, test to see if it is of any *USE*
>> #
>> deny
>> message = Sender on $sender_address not a mail server. \
>> DNS PTR RR fails to match to valid host name.\
>> # logwrite = C3B rDNS lookup for $sender_host_address $sender_address \
>> # $sender_host_name
>> condition = ${if eq{$interface_port}{25}}
>> !hosts = : +relay_from_hosts
>> !verify = reverse_host_lookup
>> log_message = C3B rDNS fail for $sender_host_address $sender_address \
>> $sender_host_name
>
>
> I've found that blockign on !verify = reverse_host_lookup causes far
> too much load on support with people calling up asking why they didn't
> get emails.
>
> In an ideal world, I'd love to turn it on, but in my experience - you
> really can't get away with it.
>
We're way off-topic now, but having a valid PTR RR and proper DNS entries may be
the single most important RFC requirement to insist on w/r zapping zombies. And
the RFC in question isn't even smtp-specific.
YMMV, but ' get away with it' is what the OTHER guy was doing.
With your acquiescence...
Bill
