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Hi Petr,
We see something similar, albeit not so extreme.
It's less deep, only 2 levels:
mx1.mx1.example.nl
But we also saw this:
mx1.mx1.nl
--
Marco
Op 30-03-20 om 11:18 schreef Petr Špaček:
> while debugging some resolution problems we have notices really weird
> queries, seemingly related to e-mail delivery. This is query list for domain
> truckinsurancekentucky.com:
>
> mx1.mx1.mx1.mx1.mx1.mx2.mx1.mx2.mx1.mta-sts.mx1.mx1.mx2.mx2.mta-sts.mx1.mx1.truckinsurancekentucky.com.
> AAAA
signature.asc
Description: OpenPGP digital signature
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