![]() ![]() ![]() The rsa.private file contains your private key the rsa.public file contains the corresponding public key. The command results in two files, rsa.private and rsa.public. $ openssl rsa -in rsa.private -out rsa.public -pubout -outform PEM A simple way to generate a DKIM key pair is via a unix machine with OpenSSL installed.Note : check with your organization’s security policy prior to utilizing third-party tools. ![]() There are third-party tools available to generate the DKIM record.Check the available documentation for the public/private key generation and policy record creation (or check in with your IT staff who are responsible for the server). If your organization has its own email server, it may have native DKIM functionality.Contact them and request DKIM to be configured and that you need a copy of the public key.Ģ – Generate the key pairs. How do I create a DKIM record?ġ – Create a list of all domains and sending services (such as marketing campaign platforms or invoice generators, also referred to as ESPs) that are authorized to send email on your behalf. More information about DKIM selectors, and discovering which ones your domain uses, can be found here. In order to connect and decipher these encrypted signatures, a DKIM selector is used. The originating email server has what is called the “private key,” which can be verified by the receiving mail server or ISP with the other half of the keypair, which is called the “public key.” The public key exists in the DKIM record in your domain’s DNS as a text file. This DKIM signing acts like a watermark for email so that email receivers can verify that the email actually came from the domain it says it does and hasn’t been tampered with.Įach DKIM signature contains all the information needed for an email server to verify that the signature is real, and it is encrypted by a pair of DKIM keys. Like SPF, DKIM is an open standard for email authentication that is used for DMARC alignment and exists in the DNS record of the domain, but it is a bit more complicated than SPF.ĭKIM gives emails a signature header that is added to the email and secured with a public/private key pair. ![]()
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