MailMum Whitepaper
Forward
MailMum offers individual services for email administrators to monitor incoming mail traffic and to control it by blocking IP addresses or even IP networks of abusive systems using Real-time Blackhole List (RBL) technology. The admin has full control over the listings by defining parameters, blacklisted (abusive), and whitelisted (trusted) IP addresses. The defined rules may apply for the whole account down to an individual server.
Mail System Today
Provided by several sources email traffic is up to 90% or unwanted emails (called spam or junk). Controlling them through spam filters (like SpamAssassin or Rspamd) is hard as it is expensive by teaching, running, and maintaining them. Also, this high load of unwanted emails wastes a lot of costly resources that must be paid and run by specialists.