Looking for a cheap, as in free, anti virus solution? Clam AV is a top rated anti virus product – and it’s open source. This preceding link is for the *nix version. You can find a Win version at ClamWin. Here are a list of some of the features:

- command-line scanner
- fast, multi-threaded daemon
- milter interface for sendmail
- database updater with support for digital signatures
- virus scanner C library
- on-access scanning (Linux and FreeBSD)
- detection of over 38000 viruses, worms and trojans
- built-in support for RAR (2.0), Zip, Gzip, Bzip2, Tar, MS OLE2, MS Cabinet files, MS CHM (Compressed HTML), MS SZDD
- built-in support for mbox, Maildir and raw mail files
- built-in support for Portable Executable files compressed with UPX, FSG, and Petite

Electric Mail, one the nation’s first email providers, recently switched to Clam AV. You can find their findings and rationale here.

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