MailWasher
7.8#3 in email anti-spam softwareFrom $49.95 a yearFree planAndroidiOSSelf-hostedWindows
VisitMailWasher suits people who want to review and filter server-side email before downloading it to a computer. The free option is limited to one account, while Pro accommodates unlimited accounts.
It suits organizations, schools, churches, public offices and personal domain owners who use standard SMTP servers for domains they own. It is not intended for consumer Gmail or Hotmail accounts.