Once the DNS values have been added to your Website DNS Hosting Server, you can log into your SendGrid account and verify the DNS records.
https://app.sendgrid.com/login
Then navigate to Settings -> Sender Authentication
Click on the respective authentication record such as the domain or the link branding. Click on the Verify button to validate the DNS values.
If it is not validating then there could be an issue with the DNS values setup. You can check with your Hosting Company Support team to resolve the same.
