Bulletproof SMTP server needed

IIMPORTANT : am looking for an existing and functional service, not a custom SMTP.

- Bulletproof SMTP server needed for bulk emailing.
- I prefer daily payments.
- Daily sending speed and limit should be at least 50.000
- I prefer to have the option of a few free credits so I can test the service before deciding.
- I need something that works straight away, not something that requires warmup.
- If possible with the possibility of being able to put the send from that you want. (spoofed mailfrom)
- Include as many details in your bid as possible (links, price info etc). NO GENERAL BIDS PLEASE