mail_max_userip_connections per remote IP not working

Hi,

I'm tryng to set a specific mail_max_userip_connections for a remote IP (webmail IMAP software), but it seems not working:

remote 1.2.3.4 { protocol imap { mail_max_userip_connections = 100 } }

and also this isn't working

remote 1.2.3.4 { mail_max_userip_connections = 100 }

I insert it at the end of 20-imap.conf file.

Is something wrong or is not supported?

I'm running dovecot 2.3.14.

Thanks

-- Alessio Cecchi Postmaster @http://www.qboxmail.it https://www.linkedin.com/in/alessice