MailSift AntiSpam Service
Real-Time, Automatic Email Protection Service.
No hardware or software to purchase or install.
No changes to your mail server or existing email client program (i.e Outlook, Thunderbird, Apple Mail).
Each Mailbox user can set their own Spam sensitivity settings, review their own quarantine and manage their WhiteLists.
Cost Effective: less than a penny per day per user for a typical small office domain. Even less with larger domains.