On 13.11.2025 22:28 Ralph Mayer via mailop <[email protected]> wrote:

> I need some ideas how to deal with this (small snippet from my logs)

Nothing. :-)
As the sender domain does not exist, your server rejects it, so you are
not being annoyed by those mails.

> As you can see, the to-address is generated and its different hosts
> at google trying to send mails.

Fine, because mostly you have a whitelist (I use virtuser in
sendmail for that), those addresses are rejected too by your server, so
those mails will never reach you.

I also see such messages, some spammers crawl message-IDs with my
domain and think that are mail addresses.

Some also can't handle plus addresses properly and try to send to
non-existent addresses. For me, that is just regular noise whose I do
not need to care about.

> [email protected] <mailto:[email protected]> did not respond

That is default.

> Also, why does this not trigger countermeasures at Google?

Because Google give a <beep> about abusers in their network.

-- 
kind regards
Marco

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