Singlefin Makes Email Filtering Service Free

San Diego-based Singlefin said Monday that it is making its e-mail filtering service for businesses free. The company's hosted email filtering service provides anti-spam and anti-virus filtering. Singlefin supplies Juno, NetZero, and BlueLight with free e-mail filtering, and said that it would use the free services to detect new spam and virus outbreaks, and also in hopes that users wil upgrade to Singlefin's paid services. Singlefin's paid services include IM filtering, web filtering, and more comprehensive email features.