Version 1.3.3 seems to have hit the sweet spot. With the exception of that clunker from last week (see: http://www.hendricom.com/forums/index.php?showtopic=185), the only undeliverables that I get back are usually redundant addresses which I add to my donotsend file.

I had only two s*p*a*m messages for all of yesterday and so far only one today.

So, diligently keeping up my Outlook Junk Senders List, slowly, but surely eliminating false positives from my firewall's s*p*a*m blocker, using SpamX and maintining my donotsend list (whew!) is finally paying off, and it's only taken hours and hours at a time since last October 5th! Now I can sit back and enjoy the well-earned fruits of our collective labors. (Do I hear echoes of the Book of Prophets: ...pride goeth before the fall?). I sure hope not!

Thanks, Jeff and all the contributors.

You're welcome! This is great.

BTW, thanks for all the feedback, and help with testing.