Jaroslaw Rafa:
[IMAP before SMTP]
> That's the usual way mail clients work: they first open an IMAP
> connection and keep it open all the time, and only when you want
> to send mail, they connect to a submission service.
>
> Only I don't know, is there an easy way to get from Dovecot a list
> of IPs that have currently open IMAP sessions?
>
> I know this is not a Dovecot list, but maybe someone here knows
> answer to this? Or maybe someone already wrote such a piece of
> software and it sits somewhere in the Net ready to grab?
If dovecot logs the client IP address then a fail2ban action could
'find' it and add the address to an allowlist.
Wietse
