Google's corporate web page, Alphabet, Inc., is on the ".xyz" top level domain.

* https://abc.xyz/

I suppose Sergey Brin is Russian as well, so what have you there?

Perhaps you have inadvertently confused ".xyz" with the ".xxx" TLD. The popular grade school acronym for "eXamine Your Zipper" is obviously not commercially desirable for the same purposes, although I cannot vouch for particular instances.


On February 12, 2022 5:51:12 AM AKST, Marc <Marc@f1-outsourcing.eu> wrote:



  (sorry for posting to list this, but I don't have any ways to contact
Marc off-list now)


    Problem is, I need to unpack each of them to be sure, that these are
 false positives and I'm afraid, that it could lower reputation of my
mail
 server IP address with major providers (like Google Mail).


 How can you get a lower reputation? Afaik dmarc is just signing your
outgoing messages.
  Marc, my domain already has problems sending mail to you, for example:

<Marc@f1-outsourcing.eu>: host spam1.roosit.eu[212.26.193.45] said: 553
5.3.0
     550We have blocked this toplevel because of spam. Use another
toplevel
     until the maintainer has resolved these issues (in reply to MAIL FROM
     command)

--

.ru is not blocked. The connect is originating from a .xyz host.



--
Sent from my Android device with K-9 Mail. Please excuse my brevity.