[Spamassassin Wiki] Update of "IntegratedInMta" by ScottLamb

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The following page has been changed by ScottLamb:
http://wiki.apache.org/spamassassin/IntegratedInMta

The comment on the change is:
More info about different Postfix options.

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  = Integrated into Postfix =
  
- The easiest way to integrate postfix and spamassassin is to use spamd.  See IntegratedSpamdInPostfix.  
- 
- Alternatively, a more complex scheme is to integrate it using Amavis, as described in IntegratedInPostfixWithAmavis.
+  * The easiest way to integrate postfix and spamassassin is to use spamd.  See IntegratedSpamdInPostfix.  This method supports [http://www.postfix.org/FILTER_README.html after-queue] filtering only and is not quite as robust or nearly as efficient.
+  * IntegratePostfixViaSpampd is a more robust and efficient solution, but also a more complex one. It supports [http://www.postfix.org/SMTPD_PROXY_README.html before-queue] or after-queue filtering.
+  * IntegratedInPostfixWithAmavis is more complicated still but provides a way to plug in ClamAV virus scanning as well. It supports before-queue or after-queue filtering.
  
  = Integrated into Qmail =