The Dkim Signature. Let’s Put It All Together. Here’s An Example Dkim Signature Recorded As An Rfc2822 Header Field For The Signed Message Tags In A Dkim Signature Header B = The Actual Digital Signature Of The Contents Headers And Body Of The Mail Message Bh = The Body Hash D = The Signing Domain S = The Selector V = The Version A = The Signing Algorithm C = The Canonicalization Algorithm S For Header And Body Q = The Default Query Method L = The Length Of The Canonicalized Part Of The Body That Has Been Signed T = The Signature Timestamp X = The Expire Time H = The List Of Signed Header Fields, Repeated For Fields That Occur Multiple Times Note Tags Above That Are Emphasized Are Required.
Dkim Signatures That Are Missing These Tags Will Produce An guatemala phone number library Error During Verification. We Can See From This Dkim Header That The Digital Signature Is Signature Is Matched With The One Stored At The Sender’s Domain. The Body Hash Is Not Listed. The Signing Domain Is Example.Com. This Is The Domain That Sent And Signed The Message. The Selector Is Jun2005.Eng. The Version Is Not Listed.
The Signing Algorithm Is Rsa-Sha1. This Is The Algorithm Used To Generate The Signature. The Canonicalization Algorithm S For Header And Body Are Relaxed Simple. The Default Query Method Is Dns. This Is The Method Used To Look Up The Key On The Signing Domain. The Length Of The Canonicalized Part Of The Body That Has Been Signed Is Not Listed. The Signing Domain Can Generate A Key Based On The Entire Body Or Only Some Portion Of It.
