On 2014-09-02, Always Learning <exim@???> wrote:
>
> On Tue, 2014-09-02 at 10:50 -0400, Chris Siebenmann wrote:
>
>> They aren't redundant but they aren't necessary. The standard is that
>> you try the A record[*] if there is no MX record.
>>
>> (This behavior is actually sometimes annoying, because it means that
>> there is no clean standards-compliant way of saying 'this machine exists
>> but you should never attempt mail delivery to it'. People often use
>> various bogus MX values for this purpose, like 'MX localhost.' or 'MX
>> .'.)
>
> Away goes my latest quick check ............
>
> condition = ${lookup dnsdb{mxh=${domain:$sender_address}}{0}{1}}
>
>:-(
>
> Just simple checks can significantly reduce spam, provided everyone
> creates MX records.
yeah, The best you can do is "Verify = sender"
--
umop apisdn
