[courier-users] Adding sbl-xbl server

Title: Messaggio

I would like to add relay.ordb.org (or other) to the existent...

Incoming mail filtering/blacklisting

`sbl-xbl.spamhaus.org`		- delete
`l2.spews.sorbs.net/127.0.0.2`		- delete

Can I modify a configuration file or doing something else?

Thanks.