Domain Authentication in Zoho Bookings

Zoho Bookings domain authentication verifies that appointment emails sent from your own domain are legitimate, so recipients’ email providers trust the sender and deliverability improves.

Why domain authentication matters

If you use a custom domain, such as yourcompany.com, to send appointment emails, authentication proves to email providers that you are a verified sender. Without it, emails may be sent using Zoho’s default address instead of your own, and are more likely to be marked as spam or land in a junk folder, which can affect deliverability and brand trust. Domain authentication is available on the Premium plan.

Who can manage it

• Super Admins, Admins and Workspace Admins can add custom sender email addresses and validate domains.
• Managers can view the domain list and validation status.
• Staff have no access to view or manage domains.

How authentication works

When a new sender email address is added, its domain is listed under Domain Authentication with a “Not Validated” status. To validate it, you add SPF and DKIM records to your domain’s DNS settings.

• SPF (Sender Policy Framework) confirms the sender’s email server is authorised to send email for the domain.
• DKIM (DomainKeys Identified Mail) confirms the message has not been altered in transit and comes from an authorised server.

Once both records are added and verified, the domain’s status updates to Validated. Public domains, such as gmail.com or yahoo.com, cannot be authenticated and will not appear in this list.