
Barracuda Reputation Block List : BRBL is a free blacklist of IP addresses known to send SPAM. Invaluement : The Invaluement anti-spam DNSBL (DNS Based Blackhole List) system blocks untrustworthy types of SPAM, where the sender sends bulk email without permission and evades traditional detection methods. MXToolBox : MXToolbox shows you if your domain name or IP address is blacklisted and checks the configuration of your domain name server. MultiRBL : This free, multiple domain name server blacklisting service cross-queries with other blacklists for IPv4, IPv6, or domain names.
Spamcop : The SpamCop Blocklist lists the IP addresses from which emails marked as SPAM by SpamCop users are being sent. Spamhaus : The Spamhaus Project hosts several DNSBLs to identify and track SPAM sources and offer anti-spam protection. To be removed from this list,visit their blacklisting center . SURBL : Unlike many lists, SURBL is not a list of message senders. It is a list of websites that are ranked in untrusted messages. How do blacklists know you've sent spam? We recently asked an email technical consultant a few questions about how senders get added to these blacklists and what needs to be done to maintain their reputation.