On 28.04.25 12:12, Benoit Panizzon via mailop wrote:
Since a couple of days, we get a increased number of complaints from
customer receiving duplicate emails.
Emails duplicated (sometimes sent 5 or more times within a couple
of hours) are all sent from outlook.com.
I start to suspect, that there might be a DNS issue causing delayed or
failed lookups with our DKIM / DMARC Milter, as my logs hint to large
delays while they run.
When I try to look up the records manually I can not reproduce.
Has anyone observed similar issues and has been able to pinpoint the
cause?
This can happen when receiving mail takes more time - your server reports
mail as accepted but the sending server notices a delay and considers
attempt unsuccessful.
Doesn't scanning of mail too much time when receiving mail from outlook.com?
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
On the other hand, you have different fingers.
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