After setting up a new Kayako Subscription, you may notice that your default or primary email address is set to Unverified even when you have finished the verification process by clicking on the activation link sent through email.
Currently, there is a known issue for newly created instances where the default email is set to unverified. Resolving this requires manual intervention by Kayako Support. If you are facing this issue, please raise a support ticket.
Setting the default/primary email address as verified requires a PRF to be raised. See PRF-12058 for example.
After the Kayako Support agent confirms the resolution, your primary/default email address should now be verified.