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Post by jabom on Dec 31, 2023 4:15:52 GMT
DKIM signature header is a digital signature created by the sender and added to a message. The receiver can then compare this digital signature with the one they generated themselves to ensure that the email was sent by the correct person or organization. Mandatory fields: v= The version of DKIM in use (value= ) d= the sender’s domain name a= This field denotes the key algorithm used to generate the signature. With values: rsa-sha (for enhanced protection) or Job Function Email List rsa-sha (for unsupported servers) s= DKIM selector (an alphanumeric value that may range between and bits) to locate the public key in the sender’s DNS. h= the list of headers that are used in the signing algorithm to compute a hash data of message headers that would be defined in the b=tag. b= the computed hash data of the message headers in a special MIME content transfer encoding called Base . bh= the computed hash value of the message body. This field contains an arbitrary string of alphanumeric variables that are generated using the signing algorithm. If any of these mandatory fields are missing in the DKIM signing header, it will lead to DKIM Permerror. Erroneous DKIM string Making sure that your DKIM DNS record is error-free is important in ensuring that you don’t end up with DKIM permanent error or.
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