Zoho Mail as IMAP Client

Zoho Mail as IMAP Client

I have a family domain created currently everyone is using Outlook over POP3 to retrieve their mails.  However some family members would like to move to Zoho Mail and other would like to use GMail...

Can adjusting my MX records perform this need.... ex. if I set mx records as follows:
10 mx.zohomail.com 
20 mx2.zohomail.com
30  ASPMX.L.GOOGLE.COM

given the above setup if a user email account is not found on zohomail servers would it try that user on the google servers?

Or would it be easier to set up everyone on google apps gmail and those that want Zoho Mail could use a Zoho MAil IMAP client to access GMail.

Has a timeframe been set for Zoho Mail as an IMAP client?