Connecting your custom domain to ProtonMail creates a personalized and secure email experience.
Once you have a domain and you’ve upgraded to a paid ProtonMail plan, you can go to Settings → ProtonMail →Domain Names to connect it.
After adding the domain name, you can follow the setup wizard, which involves changing your domain’s DNS records. Once you have completed the required steps (Verify, Addresses, and MX), you will be able to send and receive emails in your account using the custom domain addresses that you have set up!
We recommend setting up Anti-spoofing on your custom domain for added security, and for preventing your address to be abused.
Below are some additional articles to assist you while setting up ProtonMail Professional accounts:
[You are currently here] Step 1: Setting up Your Domain(s)
Step 2: Creating your Organization
Step 3: Setting up User(s)