AMaVis : (e-mail Virus Scanner) It scans e-mail attachments for viruses using third-party virus scanners available for Linux. It Supports courier, exim, qmail, postfix, and sendmail. Built-in defense against Denial of Service (DoS) attacks
sudo apt-get install amavis-stats
Avast! : It is an anti-virus program from ALWIL Software based in Prague. This is a freeware for home users and non-commercial use only. It is a good software for virus protection, with built-in anti-spyware and anti-rootkit security. Work on all modern linux distributions. It scans archives like rar, tgz, zip, gzip, tar, iso, rpm etc.
AVG Free : AVG Free for Linux is a commercial-grade antivirus software. It can be used on a single computer and is used for private, non-commercial use only. AVG Free has both command line and a graphical front end are available. It provides frequent updation and total professional security.
ClamAV : Clam AntiVirus designed especially for e-mail scanning on mail gateways.It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic database updates. The core of the package is an anti-virus engine available in a form of shared library.Built-in support for document formats including MS Office and MacOffice files, PDF, HTML and RTF. It supports archives like rar, tgz, zip, gzip, tar, iso, rpm etc
sudo apt-get install clamav