Video Screencast Help

VSAPI vs SMTP

Created: 07 Sep 2007 • Updated: 02 Mar 2009
Can anyone explain the difference between VSAPI and SMTP scanning?  More specifically, I'm referring to the home page on the right where it says 'Files scanned via VSAPI', 'Files scanned via SMTP', and 'Messages scanned via SMTP'.   What are the differences between these 3 categories?  What specifically are each doing?
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