So, do I use the best option for my scenario? I mean, I can't be the only person using more than one domain with multiple IPs, can I? I would just like to confirm that I am on the right track.
I would also like to hear more about people using multiple domains on one IP. I understand Bruce's example above, but I am not sure on the following questions:
1. Wouldn't any authorized sender be allowed to send emails for all domains?
2. What about the certificates for SSL and TLS for each domain?
Thanks!