restrict map-login by geoip?

[Terry Barnum]

Is there a way to restrict my user logins from a set of IPs? For example, all my users are in the US so there shouldn't be any logins from other countries. Can I tell dovecot to restrict logins to a CIDR list of US IPs? Can someone point me to docs on how to set this up? I've searched but haven't found how to accomplish this.

Thanks,
-Terry

Terry Barnum
digital OutPost
http://www.dop.com