Dnia 26.05.2025 o godz. 20:08:56 J Doe via mailop pisze:
> Does anyone see deliver attempts like this ?  No "ordinary" human
> account would be a string of alphanumeric characters

Yes, they are. In the company where I work, email addresses - besides
firstname.lastn...@example.com, have also the form employe...@example.com
(and it's actually the basic form, firstname.lastname is an alias), where
employeeid is a randomly-looking alphanumeric string.

I have also seen real, human accounts eg. at Gmail, where the username part
is a randomly looking alphanumeric string. I have myself a few of such
accounts at Gmail for testing purposes.

> might be a list verification service with a bug, there seems to be a
> fair number of attempts.
> 
> What could this be ?

However, it's more probable that it's just a brute-force guessing of email
addresses. I have seen such attempts, which were easy to recognize, as the
came in sequences like "a2321@...", "a2322@...", "a2323@..." etc.
-- 
Regards,
   Jaroslaw Rafa
   r...@rafa.eu.org
--
"In a million years, when kids go to school, they're gonna know: once there
was a Hushpuppy, and she lived with her daddy in the Bathtub."
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