dovecot - May 2015 - timeout for POP3 query.

Is there a way to  timeout  POP3 query if they come to often?

More precise I want to know if there is a setting in dovecot that makes 
it ignore pop3 requests from a certain user if they come more often then 
a certain amount of time.  I am looking for a setting in dovecot, not a 
firewall solution.
I would like dovecot to answer something like "requests come to often, 
please come back later."

regards
christian

On 24 May 2015, at 10:34, Christian Eichert <dovecot at zp1.net>
wrote:
> 
> Is there a way to  timeout  POP3 query if they come to often?
> 
> More precise I want to know if there is a setting in dovecot that makes it
ignore pop3 requests from a certain user if they come more often then a certain
amount of time.  I am looking for a setting in dovecot, not a firewall solution.
> I would like dovecot to answer something like "requests come to often,
please come back later."
http://dovecot.org/patches/2.0/pop3-throttle-plugin.c may be useful for you.
Although that was written for Dovecot v2.0 and it probably requires some changes
to compile.