Adding a new alias to your Google Workspace account email.

I operate multiple domains with a single inbox. I want to send emails as those domains but receive replies all in the same Gmail account.

1. Register the domain
2. Log into Google Admin
3. Manage Domains
   Then click “Add a Domain”
4. Enter your new domain and the Domain Type “Secondary domain”
   
5. Select TXT verification, follow the instructions
6. When thats verified return to your Domains Manager panel
7. Click “Activate Gmail”
8. Set up MX record, putting your MX records into your DNS server
9. Leave that to get checked by Google, this should take a minute or two with a DNS nameserver provider like Cloudflare
10. When that’s done you should see status “Verified Gmail activated” next to the domain on the Domain Manager
11. Now in Google admin go to Users > Click on your User > on the user editor check “Add Alternative Emails”, type in the prefix eg “sales” and select the domain you just added from the dropdown and click save.
12. Go to GMail and log in as that user.
13. Click Settings Cog > See all Settings
    
14. Accounts Tab > Send mail as: > Add Another Email Address
15. In the yellow popup: Name: the sender name “My Company”, Email Address: “[email protected]” and click Next Step
16. Open your inbox again and copy the code from the received email from your Team and paste the code into the yellow popup window. That should be all done.

MX Records

MX records for accounts prior to 2023

This was found here