Re: [exim] dnsbls

Martin A. Brooks wrote:
> Hi
>
> This will be my onlist comment on this thread.
>
> Phil (Medway Hosting) wrote:
>> Having a non generic PTR means that you are serious about running a mail
>> server, have taken the trouble to get it set up properly, are far less
>> likely to be a spammer who has signed up for a server with a duff credit
>> card, and not just some kid at home or a trojanned box !!
>>
>
> Or, alternatively, as it is in my case, having a shoebox server to
> handle outbound mail for my LAN is convenient, so I do so. When sending
> mail from home, it all goes out that way.
>
>> IT WORKS.
>>
>
> Did you notice the part where your server threw away a perfectly
> legitimate non-spam email?

While it may not be 'spam', there is NO SUCH ANIMAL as a 'perfectly
legitimate' message from a server without a proper rDNS / PTR RR.

Not since smtp 'big bang'

There are only those for whom generous Sysadmins may, or may not, choose
to overlook the sin.

> That's not so much "WORKS" as "FAIL".
>

Not.

- it works precisely as intended.

>
>> I wouldn't recommend leaving your PTR as it is, but "your network - your
>> rules" :-)
>
> Indeed.
>
>

It is a puzzle to me, Martin, that the <domain>.<tld> you use for your
email address & origination purports to be that of a mail
handling/filtering service - one that charges a not-insignificant fee, yet.

Presuming you have any influence at all over their configuration, why
would you want to position yourself as part of the PROBLEM - by
suggesting that those who make effective use of rDNS fail/mismatch cease
so doing?

- instead, why not become part of the SOLUTION - by getting your finger
out and entering a PTR RR, ELSE using a smarthost for outbound which
DOES have such RR.

Or at least not insisting that you are right and the world is wrong...

Help others to help you, IOW.

I'm not throwing rocks on theory - we ran w/o PTR RR for years also.

Our 'laziness' evaporated when AOL and the like started rejecting.
And they were correct to do so.

Took us about five wall-clock minutes to have the PTR RR put in place by
our upstream.

The alternative just doesn't make good sense in today's zombified
environment.


Bill