> So, I guess my question would be, does anyone know of a way to allow a
> natural recipient validation check downstream to the Exchange 
> 2003 server
> before SA starts working, so that SA does not start testing 
> on all these
> bogus email addresses. Again, I am looking for some solution 
> that does not
> involve creating recipient verification maps on the Postfix server.

We use the following script to verify the intended recipeint is a valid smtp 
address.
http://www-personal.umich.edu/~malth/gaptuning/postfix/

You might want to check these archives or the amavisd-new archives for 
getadsmtp.pl.

HTH

--
Matt

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