MX entry problem

MX entry problem

Hi, i just started to use Zoho Mail and i like it very much but i have a problem. My domain is

santoyolara.com

and the problem is that there are a lot of email Accounts associated with that domain, almost everyone uses Outlook but they are 3 persons including myself that dont like Outlook software.

If I modify the MX entries, everything Works perfect but all my other co-workers except me (i just have one user now) stop receiving their email.

Is there a way in which i can use zoho mail just with a few Accounts in the santoyolara.com domain?

thank you very much

Samuel Santoyo