[Dovecot] mail_max_userip_connections

What is the appropriate setting for mail_max_userip_connections ?

My POP3 connections seem to be mostly 1 at a time, but my IMAP connections are often 3 per user per IP. Is this appropriate? If I change the IMAP setting to mail_max_userip_connections=1 will it break things for the user?

I am trying to improve this situation:

ps auxwww | grep "imap " | wc 237 3080 22400

TIA,

• Richard