No e-mail scanning solution can be 100% effective. There is always a trade off between accepting spam and rejected legitimate e-mails.
Our Goal: Zero false positives
The key to achieving zero false positives is in PerfectMail's history and reputation engine. By watching and recording e-mail activity, PerfectMail learns the identity of your e-mail addresses and their e-mail peers; as well as building and learning the reputations of both known and unknown mail servers.
PerfectMail learns and remembers who you e-mail, so we can let those messages through.