Your question seems to originate from a fundamental misunderstanding of a facet of DNS CNAME records. You seem to think that if you have a CNAME record anywhere in the zone, then you cannot use MX records at all. This is of course not true, and a basic understanding of DNS (or actually paying attention to one of EEAA's comments which explained this) would make this clear.

As for your comments, I have reviewed all of the deleted comments. Many of them were rude and offensive, so [you should not be surprised][1] that they were deleted. The behavior displayed in these comments is not permitted on any Stack Exchange site.

I am not sure how you interpret EEAA's comments as "abusive" or "condescending". You lack some fundamental knowledge of DNS which would help you understand your situation, and encouraging you to learn the basics of the technology you're trying to work with is hardly abusive.


  [1]: https://serverfault.com/help/be-nice