Split Delivery Working Fine Except Cannot Send Mail to Internal Mail on Google Apps

Split Delivery Working Fine Except Cannot Send Mail to Internal Mail on Google Apps

We have Some emails based in Google apps and are using Google apps as primary for the split delivery system.

all mails are being received in the zoho mail box perfectly

But. when I try to send mail from xyz@mydomain.com (which is in ZOHO) to abc@mydomain.com (which is in GMAIL)

the mail is bouncing (undelivered)

but the Vice-versa (gmail to zoho) is working fine...