NoSpamToday! for Servers - Anti Virus Filter

Anti Virus Filter Setup

NoSpamToday! supports all third-party virus checkers that offer a command line interface. If your virus scanner is not on the list of supported scanners, choose ’Other’ on the first page of the setup dialog. Consult the virus scanner’s documentation to find out command line options and usage instructions.

For most filters, the output of a filter is forwarded to the next filter as its input. This can’t be applied to most virus checkers, because virus checkers analyze a message only, signalling ”yes, this is a virus”, or ”no, this is not a virus” with different program exit codes. For this reason virus filters are by default configured in a way that the input file is forwarded to the output, by leaving the ”use console output” switch unchecked.

Normally, you will want to reject/delete if the return code of the filter indicates a virus has been found, and accept/deliver if not. Set the return code policies accordingly.

When testing a virus filter, test it both against the sample virus mail, and against the sample spam mail. The virus mail must be blocked (reject/delete), with the filter output empty, while the spam mail must pass (filter output the same as the input).

Note 1: Integrating a virus checker in NoSpamToday! requires that you install the virus checker software first. If you have not installed the virus checker yet, run the anti virus setup wizard again once you have installed the virus checker.

Note 2: If you want to use F-Prot for DOS, right-click F-PROT.EXE in the Windows Explorer to bring up the properties dialog, and make sure the ’close window on terminate’ (or similar) property is checked.

Learn More ...