Mhmm… but they returned different results, for dig vs OpenSMTPd filter lookup?
Not sure, as I don't log the replies, but I don't think so.
May cache TTL have expired and record re-fetched with your local test?
What’s your local cache software, is it able to handle large A record lists?
> On 3. Aug 2020, at 12:23, Tassilo Philipp wrote:
>
> Thanks for the reply and your thoughts.
>
>> There should be nothing limit FCrDNS here, despite that
>> these are a lot of records.
>>
>> But have you tried the dig lookup below from the actual mail
>> server at the time (or shortly
Thanks for the reply and your thoughts.
There should be nothing limit FCrDNS here, despite that
these are a lot of records.
But have you tried the dig lookup below from the actual mail
server at the time (or shortly after) the time of the failure?
Yes, that was the first thing I tried, and I
