dns / mx settings

dns / mx settings

Hi 

I was able to receive mails on my blackberry until recently when i went on the BES service.

I have tired to delete and re-add the account but it only pulls old emails from the server when it wasnt hosted on zoho. 
when I go to the advanced settings on my BB to input server details, I notice it is defaulted on mail.transitit.com, imap settings.  

my domain is hosted via arvixe.com and my mx records are set to mx.zohomail.com & mx2.zohomail.com but the mails are still not delivering. 

I was thinking maybe I would have to change my DNS records (cname) to point to zoho but i do not have the information again for that. 

Thank you