Well luckily I'm the mail administrator on both sides of this issue! :)
What I found was that my firewall on the receiving side has a feature that utilizes uribl. Disabling this feature stopped the email rejections. Upon further investigation into this (with the help of some others folks) it was determined that uribl might have changed the way they do their blacklist notifications now. It looks like their "whitelists" (i.e. those that should not be blocked) also return results now - which is probably why the uribl feature blocks the email. http://uribl.com/about.shtml
From what I can see, their whitelist is not included in the multi list or its not working.
I maybe off base on this but wanted to post what I have found so far. I am currently catching up on all the suggestions and info presented so far.
Thanks again for everybody's help.
Duane
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