![]() During the validation process, the server runs a DNS query according to the combination of the authorized domain ( d=) and the selector ( s=). Pick a DKIM selectorĪ selector or a selector prefix is a name you need to specify to create the DKIM key. NB: If you’re using different domains for sending emails, you’ll need to have separate DKIM signatures for each domain. You may use different domains for sending different types of emails, so make sure each is authorized. When validating DKIM signatures, the recipient’s mail server checks whether the domain included in the signature ( d=) matches the domain included in the ‘ From:‘ field of the email. To create the DKIM signature, you will have to specify only two tags of all the above: an authorized domain ( d=) and a selector ( s=). t= – a timestamp of when the email was signed.c= – a canonicalization algorithm for the header and the body.a= – a signing algorithm used for the creation of a DKIM record. ![]() Here is an example of a regular DKIM record: DKIM-Signature: v=1 a=rsa-sha256 c=relaxed/relaxed d= s=default t=1572282571 bh=NFzBvJ/pEmf+yUHDd/Y7dYNH9pE+B圆o95KcxhwFL78= h=From:To:Subject:From b=QwgINKqwcBu3GbeWm2Be81qXks6Pq9yMmDZl9C6mT8moXVBeokpEmDN+0RyZFiOmNH30kbe6HbS2lY3b1Pf726UH/V/0VAH0nigTuir4TWdN/IUePV+goQdEJ2+sDQ1fHlVjyyJCRwCiFiZpBIjhTBNN0vrgNJZ/gSLLOvq6k3s= DKIM is meant for the recipient’s email server, which authenticates the sender based on it and, if everything seems to be fine, lets pass the email to the mailbox. Recipients don’t see this unless they dig into the source code of the email. It looks like a random set of characters mostly unreadable to a human user. What is required for a DKIM signature?ĭomainKeys Identified Mail (DKIM) is a digital signature added to outbound emails. Don’t make his mistake and set up your DKIM record with the help of this guide. ![]() The reason was quite simple: Mark’s emails lacked a DKIM signature. Mark’s marketing emails reached Yvonne’s mailbox but ended up in a ‘spam’ folder. In the DKIM Explained blog post, we featured a doleful story of a product owner named Mark who missed a chance to sell his product to a prospect named Yvonne. ![]()
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