How to find my C Name record?

How to find my C Name record?

I accidentally deleted my C record from the DNS settings for my domain. 
My email is working fine but I need to re input it so i don't have issues further down the line. 
I have read the help pages on verifying my account but they don't give the specific record I need to add for my account (The C Name is blanked out with stars)
How do I retrieve the C Name record for my own account?