Sender Reputation
We allow our users to block from senders they don't trust. We also block all traffic from ips found on the following ip reputation sites:
- spamhaus (xbl, pvl, sbl) https://www.spamhaus.org
- senderscore/returnpath https://www.senderscore.org
- cloudmark https://www.cloudmark.com/en
- spamcop https://www.spamcop.net
- sorbs http://www.sorbs.net