Clam AntiVirus is a GPL anti-virus toolkit for UNIX and was coded to detect email viruses. It has a very flexible scanning engine which can be used to provide Third-Party add-on signatures.
Sanesecurity add-on signatures provide enhanced email security against the following email types:
Phishing, Spear phishing, Fake lottery, Ecard malware, Casino, Fake jobs, Fake loans, 419s, Fake Diplomas, porn, emailed malware and other general spam.
Since 2006, SaneSecurity have provided ClamAV Third-Party signatures to the web community that are of professional quality.
Signatures are updated serveral times a day and our twitter page reflects that.
We are not a company… and producing the signatures and support for the signatures, are carried out in our spare time.