I had SendStudio installed on a couple of web sites, and while it was great and
feature rich, it caused several ISP's to croak because of throttling and other
issues.

I have an E-mail list of over 20K subscribers and I send out a monthly update.

I tried Sendblaster, but it lacks in providing info for bad address updates and
optouts. Looking for suggestions for an alternate. I'd like to run it through my
regular ISP and on my PC.