Spam Filtering for Mail Exchangers:
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# A.9. Adding Anti-Virus Software

Exiscan-ACL plugs into a number of different virus scanners directly, or any other scanner that can be run from the command line via its `cmdline` backend.

To use this feature, the main section of your Exim configuration file must specify which virus scanner to use, along with any options you wish to pass to that scanner. The basic syntax is:

    av_scanner = scanner-type:option1:option:...

For instance:

    av_scanner = sophie:/var/run/sophie
    av_scanner = kavdaemon:/opt/AVP/AvpCtl
    av_scanner = clamd:127.0.0.1 1234
    av_scanner = clamd:/opt/clamd/socket
    av_scanner = cmdline:/path/to/sweep -all -rec -archive %s:found:'(.+)'
    ...

In the DATA ACL, you then want to use the `malware` condition to perform the actual scanning:

      deny
        message  = This message contains a virus ($malware_name)
        demime   = *
        malware  = */defer_ok

The included file `exiscan-acl-spec.txt` contains full usage information.

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