Most web hosts have a 100-500 emails-per-hour limit, any emails sent over that are automatically discarded. The best way to find out what a web host's limits are is to use the Live Chat feature found their websites, or email them directly and just ask (they usually don't advertise this). If you find a web host in the USA that doesn't have these limits, please post it here.
PS - moving this to the Web Hosting section
Same idea, only my list is much larger. I'm around 250K.
Is there anything downloadable that can handle this kind of list . . . preferably lower in cost.
correct, i would suggest a VPS or Dedicated Server so users can tweak the MTA settings for larger lists
You can send them all through Gmail Smtp Server ..!
I sent over 10k with hostgator without getting caught.