QUESTION:
Can I create different MX record entries for two different email addresses? For example, I can create one record for john@example.com and direct a different email mary@example.com to a different mail server?
ANSWER:
No, MX records need to be directed to a single mail server per domain or sub-domain. One work-around solution would be create a server that forwards mail to other servers based on an email address. For example, you could forward all mail from john@example.com to another server.