Follow these steps to create a CNAME record. This will help us authenticate your domain.
Verifying your domain
Log in to your Shopify Admin account.
Go to Settings and select Domains.
Click the domain for which you need to add a CNAME record.
Click Domain settings and then select Edit DNS settings.
Click Add Custom record and then select the record type as CNAME record.
Specify the Host Name = tec1._domainkey
Specify Points to = tec1.dkim.tinyemail.com.
One more thing ...
Before you start sending, reach out to [email protected] to confirm that your DKIM has been configured correctly and added by us!