You can manage all domain settings related to an account in the Domains section on the Settings page. Here, you can add your custom domain and create the DNS records needed to verify your domain. Once verified, your domain can then be used to send emails to your clients with any username (the part of the email address before the "@" symbol).
You can use your main (apex) domain (e.g. company.com) but a subdomain (e.g. mail.company.com) is recommended.













