nightduke wrote:
Jul  6 14:42:14 vps vpopmail[28104]: vchkpw-smtp: invalid user/domain
characters dÇ:58.63.151.44

Hi at my server i saw at the log a few attemps of deliver email.

Anyone know a way to block this kind of attack?

Thanks

Yes, fail2ban.
We've talked about it on the list previously. You're getting invalid characters, which are not the same thing as an "attack".



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