MX Records - Forward

Hello,

I administer our domain through another provider and would like to switch some of my users to Zoho and leave some of them with their current configuration. Unfortunately, I cannot change the MX records for some of the users without changing it for all of them.

I was wondering, is there a way to auto-forward e-mails from this CP to the underlying Zoho account? For example, would it be possible to autoforward from say John@mydomain.com to 121212@zoho.com (the underlying address). I could then continue to use the outgoing mail server settings?

Thanks very much for your help!

Pete