Contributed by jose on from the keeping-the-enterprise-secure dept.
I used to installed electronic mail firewalls, and I typically started with the Procmail sanitizing ruleset with some additional modifications for the site. While not perfect, it caught most email viruses of both known and suspicious signatures.
Another project worth looking at is OpenAntivirus , which is an open source toolkit which works with commercial antivirus components. This allows for any UN*X system, like OpenBSD, to serve a Windows network. It may be worth seeing if it can be made to work on OpenBSD.
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