[RCD] DNSBL Plugin

Hi devs,

I'm going to update DNS-Blacklist plugin (MyRoundCube) to play with the new Plugin API.

It checks if an IP is blacklisted. This is very usefull for public webmails to keep off spammers. It helped me very much on http://mail4us.net to keep spammers off my public test environment for MyRoundCube.

How would you like to see it? Should it lock out a user already at the front page (login) or is it better just to block certain tasks like sending messages, setting a forwarder or an autoresponder and let the user access for other tasks like reading his messages even he is blacklisted?

Regards, Roland

List info: http://lists.roundcube.net/dev/