Spam Blocking by filtering on username / id

[Bernd Petrovitsch]

On 23/09/2019 07:29, Plutocrat via dovecot wrote:
> This is probably quite an easy question, but I haven't been able to
> find the answer. I'm running a server where all the email addresses
> are in the format "user at domain.com". I've noticed that a large number
> of fake login attempts use the format "user" eg. reception, service,
> root, admin. 
> > Is it possible to prevent any such logins to these email users
> > without
an @domain.com? Or maybe ignore them. Or drop them from the logging.

It's not directly a solution within dovecot but "fail2ban" exists.

MfG,
	Bernd
-- 
Bernd Petrovitsch                  Email : bernd at petrovitsch.priv.at
                     LUGA : http://www.luga.at