I get the following error:
The Dynamic Spam Rejection with RBLs edit failed: The requested RBL zen.spamhaus.org did not pass validation. Please ensure it is spelled correctly, or contact support for assistance.

It used to work fine... Did something change with zen.spamhaus.org, can't I use it anymore?

Also, does anyone have an up to date list of all the best ones to add in the extra list?

Kind regards,