[Dovecot] Delay on failed pw attempts

[Dean Brooks]

Hi,

Is there a way, or can a way be added, to add an "auth_failed_delay=10s"
style option that would put in an artificial delay after a failed
password attempt?

As it stands now, Dovecot seems highly vulnerable to widescale
brute-force password dictionary scans.

Even if it's not configurable, can a delay be hardcoded to something
like, say, 10 or 15 seconds?

--
Dean Brooks
dean at iglou.com