Perfect — now we’re aligned ????
You want TRUE split delivery:
???? Same domain
???? Some mailboxes on Google Workspace
???? Some mailboxes on cPanel
???? Mail should automatically go to the correct server based on user
No forwarding hacks. No smart host.
This is called:
✅ Split Delivery (Google + cPanel)
Google calls it Split Delivery
cPanel calls it Local + Remote delivery
This is enterprise-grade setup.
Let’s do it cleanly.
???? How Split Delivery Works
MX stays pointing to Google (primary).
Google checks:
-
If user exists in Google → delivers locally
-
If user does NOT exist → forwards to cPanel
So:
✅ STEP 1 — DNS (Only Google MX)
Your domain must use ONLY Google MX:
❌ Do NOT add cPanel MX.
✅ STEP 2 — Google Workspace Split Delivery
Admin Console →
Apps → Google Workspace → Gmail → Routing → Hosts
Create new route:
Add Host
Name:
Host:
Port:
TLS:
✅ Optional (recommended)
Save.
Then:
Routing → Default Routing → Configure
Choose:
✅ For recipients not recognized by Google
Action:
➡ Change route
➡ Select cPanel host
➡ Add more recipients = OFF
➡ Perform MX lookup = OFF
Save.
What this does:
If Google doesn’t find mailbox → sends to cPanel automatically.
✅ STEP 3 — cPanel Side
WHM →
Email Routing
Set domain:
✅ Local Mail Exchanger
This tells Exim:
“I host mailboxes locally.”
✅ STEP 4 — Create Users
Google Users
Create normally.
cPanel Users
Create normally.
No forwarding needed.
No duplicate accounts.
✅ STEP 5 — SPF Record (CRITICAL)
Add BOTH servers:
Replace YOUR_CPANEL_SERVER_IP.
???? Result
| User Exists Where | Mail Delivered |
|---|---|
| Google Inbox | |
| cPanel | cPanel Webmail |
| Unknown | cPanel |
True split delivery.
⭐ Production Tips (Important)
1. Enable TLS on Exim
WHM → Exim Configuration → Enable TLS
2. Reverse DNS for cPanel IP
PTR → mail.yourdomain.com
3. Test
From terminal:
???? This is exactly how large companies do hybrid migration.
Kalpesh — since you already manage WHM/cPanel daily, this setup will feel natural once done.
If you want, next I can show:
✅ Google Admin screenshots
✅ Exim verification commands
✅ DMARC + DKIM setup
✅ Rollback plan
✅ How to migrate users gradually
Just say ????
