I'd like to have an SMTP server which is fast, cheap, and reliable.
Before paying, I must test the server, and confirm it working with the softwares. I already have high-quality email sending softwares, and huge email lists.
So, in conclusion, all I need is the SMTP server, it must be have capacity to send around 50,000 emails per hour. I will read and think about alternative ways. Serious bidders only please.
Also, emails sent via the SMTP server, must reach inbox.