Private Domains

Private domains allow for receiving of email at any address within a domain. Private domains can be purchased as an addon or as part of a plan.


BYODomain (Bring Your Own Domain) allows you to easily receive email with a domain or subdomain you already own. If you do not already own a domain you can use our Zero-Setup Subdomain. Alternatively, you can purchase a domain from a registrar (Namecheap or GoDaddy) and configure it for Mailsac.

Zero-Setup Subdomain

The Zero-Setup Subdomain automatically creates a subdomain under (eg that is ready to receive email with no additional setup. This is the ideal option if you do not own a domain or do not have access to change the DNS records for a domain.

Zero-Setup Subdomain Configuration

Setting up a Zero-Setup domain only takes a few seconds.

  1. From the dashboard, select Verified Domains.

  2. Select “Setup a Custom Domain”

  3. Enter a subdomain name and select continue

  4. Send a test email to any address at in the private domain. There is no need to configure individual addresses. Sending an email to the address creates the address.

  5. Enter the email address you sent the email to.

  6. Verify the email was received.