timeout for POP3 query.

[Christian Eichert]

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