Domain Key

Domain key normal form bk nf the definition of dk nf uses the terms domain key and constraint.

Domain key. Both domainkeys and dkim were published in may 2007 domainkeys as an. A domain constraint specifies the permissible values for a given attribute while a key constraint specifies the attributes that uniquely identify a row in a. The constraints are verified by the domain and key constraints.

Domain key normal form dk nf is a normal form used in database normalization which requires that the database contains no constraints other than domain constraints and key constraints. A key is a unique identifier of the tuple. Aspects of domainkeys along with parts of identified internet mail were combined to create domainkeys identified mail dkim which is now widely used.

Domainkeys informally dk is a deprecated e mail authentication system designed by yahoo to verify the domain name of an e mail sender and the message integrity. Domain key normal form is the highest form of normalization. It is based on constraints domain constraint.

The reason is that the insertion and updation anomalies are removed. Setting this up validates your emails with domain keys configuration for email authentication zoho mail.