Welcome to the internet this is normal, every hour, just make your MTA best practise, trusted RBL, and you be OK
On Tue, May 27, 2025 at 10:17 AM J Doe via mailop <mailop@mailop.org> 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 > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop >
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