I often observe this behavior from many people for many reason.
Mostly I've seen this in the email list cleaning services trying to
determine whether my clients' MTA support catch-all addresses.
From my own experience, maintaining a catch-all can signal to email
marketers that the domain is valid for all addresses, which I've found
ironically discourages those marketers to sending to those clients.
Of course, YMMV and not one shoe fits all sizes.
k
On 5/26/2025 7:08 PM, J Doe via mailop wrote:
Hi,
I operate a small mail server for a non-profit organization. Over the
last two weeks or so, I have observed servers connecting and
attempting to deliver to non-existent addresses.
Ordinarily it's pretty easy to figure out what's going on ... they are
approximations of accounts such as: first-initial-last-name@domain,
which I am assuming are e-mail list validation services or possibly
people attempting to deliver to a mistyped account name, but now I am
seeing delivery attempts for a seemingly random list of alphanumeric
characters - for example, something like: s8d2x1@domain.
Does anyone see deliver attempts like this ? No "ordinary" human
account would be a string of alphanumeric characters and while this
might be a list verification service with a bug, there seems to be a
fair number of attempts.
What could this be ?
Thanks,
- J
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