Generally you should use a third party utility such as Declude to tie SNF into IMail. Alternatively there are other tools (such as eWall or ORF) that can integrate with SNF and provide proxy and/or gateway filtering services in front of IMail. These tools provide the ability to integrate additional tests and a good deal of flexibitlity in how messages are handled.

For IMail systems that only need basic filtering abilities we now have a utility that integrates SNF with IMail directly. MINIMI - the MINinmal IMail Insert tool provides the ability to quarantine, delete, or deliver (with injected headers) messages based on the result code produced by the SNF scan.