The Anomy sanitizer is what most people would call "an email virus scanner".
That description is not totally accurate, but it does cover one of the more
important jobs that the sanitizer can do for you - it can scan email
attachments for viruses. Other things it can do:
* Protect you from email-based break-in attempts which exploit bugs in common
email programs (Outlook, Eudora, Pine, ...).
* Block or "mangle" attachments based on their file names. This way if you
don't need to receive e.g. visual basic scripts, then you don't have to worry
about the security risk they imply (the ILOVEYOU virus was a visual basic
program). This lets you protect yourself and your users from whole classes
of attacks, without relying on complex, resource intensive and outdated
virus scanning solutions.