clean SMTP Relays up to 50,000 emails per day - Repost - open to bidding

I need SMTP relays that will allow up to 50,000 emails per day I have my own software willing to pay $100 per month must have clean IP address and if the ip gets blocked by major carriers then must be willing to replace in within 24hrs must not be blocked by any major carries such as Att,Gmail, AOL, yahoo,Comcast, sbcglobal etc.