DKIM (DomainKeys Identified Mail) is an authentication protocol used to verify the legitimacy of an email sender. It works by allowing the receiver to confirm that a message was sent by an authorized mail server associated with the sender’s domain.

When it comes to our email server, the return path is our server address. This means that emails sent from our customers will appear as though they were sent from us. The DKIM policy will then verify the legitimacy of the message by looking at the return-path DNS. This would not be the customer’s domain, but our own.

As such, we do not have a DKIM signature for SendGrid that we can share. In order for customers to implement their own DKIM policy, they will need their own SendGrid account, and they can do so by following the instructions from the article DKIM Records Explained.

We hope this article has helped you understand DKIM and its application. If you have further questions or inquiries, please do not hesitate to reach out to our team.