Limiting correct SMTP logins

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matthiasmaciej
Posts: 1
Joined: Thu Jan 26, 2023 11:30 am

Limiting correct SMTP logins

Post by matthiasmaciej »

Hi,
I would like to limit the number of valid logins per minute to the SMTP server and log this value per user.
I would like to get such an effect that after exceeding e.g. 10 logins per minute, the user on the next attempt will get a message about the exceeded number of logins and the need to wait.

I also need to detect valid logins from different IP addresses from the last hour - I need this to detect hijacked account login credentials that have been used to send SPAM - e.g. via a botnet.
Thank you in advance for your reply.
Matthias.
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