SPLIT Delivery GMAIL AND CWP POSTFIX

[primzen]

Hello , we are trying to setup SPLIT Delivery using Gmail And CWP email client . We used these guide from gmail https://support.google.com/a/answer/2685650?hl=en#zippy=%2Croute-messages-with-split-delivery

Our goal is to have some emails in GSuite and some email from CWP email client that use one business domain.

Example:
Gsuite Email Accounts
- gsuite1@example.com
- gsuite2@example.com

CWP Email Accounts

- cwp1@example.com
- cwp2@example.com

We tried to follow the instruction from google and we don't have any problem when sending and receiving in Gsuite emails but we got some error / Bounce when sending to emails that using CWP Postfix as email server.


sample@gmail.com -> gsuite1@example.com = WORKING
gsuite1@example.com -> gsuite2@example.com = WORKING
cwp1@example.com -> gsuite1@example.com = WORKING

sample@gmail.com -> cwp1@example.com = NOT WORKING / BOUNCE
gsuite1@example.com -> cwp1@example.com = NOT WORKING / BOUNCE


Check this error screenshot : https://snipboard.io/oK1eZb.jpg


554 5.7.1 <email.com>: Relay access denied



my other settings in cwp mail server
1. Mail Routing  = Remote
2. I added DNS MX records of google to my domain (example.com).


Any ideas how to fix these error?

[PakPos]

why not try the simple one

all MX goes to GSuite
then you make filter there

or all MX go to CWP
then set domain forward