Bernd Wurst writes:
Hi.
I just wondered if there is any built-in way to have courier mail server
log Authentications (successful and unsuccessful) in a clean and simple way.
In esmtpd config, I can log the dialog, in authdaemonrc I can turn on
debugging but that's clearly not an easy way to have authentications
logged. Auth failures get logged as errorneous SMTP response but I did
not find anything about successful logins.
Any idea on that?
The only logging options are the ones that can be set in authdaemonrc, and
in maillog.
I would like to build some heuristic detection about hacked accounts.
Not really rate limiting but something "alert me when an account logged
in a hundred times in a few minutes".
A single successful authentication is sufficient to send an unlimited number
of emails. SMTP allows multiple emails to be sent for a single connection.
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