Reputation monitoring sites
There are a number of sites online that provide public information about reputation of an IP address or domain name.
- Sender Score – http://senderscore.org/. Provided by Return Path. They collect data from some ISPs and blocklists. Using a proprietary formula, they calculate a sender score running from 1 – 100 for each IP address sending mail to their network. Higher scores means a better reputation. Can be inaccurate for IPs sending very low volumes of email. Some ISPs use Sender Score to feed into their delivery decision engines.
- Sender Base – http://senderbase.org/. Provided by Ironport / Cisco. They collect publicly available data as well as data from their userbase. Reputation is reported as “good” “poor” or “neutral.” Senderbase scores feed into some ISP delivery decision engines.
- AOL reputation – http://postmaster.aol.com/cgi-bin/plugh/check_ip.pl. Reports the reputation of IPs as determined by AOL. Uses a scale of “good” “poor” or “neutral”.
- RoadRunner blocks – http://security.rr.com/amIBlockedByRR. Reports if a particular IP address is currently being blocked from sending mail to Road Runner.
- Spamhaus blocks – http://www.spamhaus.org/. Reports if an IP is currently listed on any of the Spamhaus lists.
- Sendmail Reputation – http://sendmail.com/sm/resources/tools/ip_reputation/. Reports reputation of an IP address as measured by Sendmail.
- Trusted Source – http://www.trustedsource.org/. Provided by McAfee.
- Commtouch – http://www.commtouch.com/check-ip-reputation/. Provided by Commtouch.
- Barracuda Central – http://www.barracudacentral.org/lookups/. Provided by Barracuda, shows what IP addresses or domain names are currently blocked.
- SNDS – http://postmaster.live.com/snds/. Provided by Microsoft / Hotmail / Live.com. Will show IP addresses that are currently blocked by Microsoft.