I have just transferred registrar from GoDaddy to CloudFlare. And I need to transfer the DNS validation for my AWS Certificate Manager, which have already been validated previously through GoDaddy.
AWS uses a leading underscore, and they have warned that some DNS providers may not support leading underscore, e.g. _a79865eb4cd1a6ab990a45779b4e0b96.yourdomain.com
Can someone tell me if a leading underscore is supported by CloudFlare as CNAME values? I don’t have any issue adding a leading underscore into the DNS record form in CloudFlare, but I an concerned if it’s being ignored (or not supported).
Thank you for your help