Changes to DomainKeys and new DKIM app

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The standard for signing and authenticating email messages has recently been trending away from DomainKeys and moving toward it’s successor, DKIM, or DomainKeys Identified Mail. DKIM has a lot of advantages over the old DomainKeys, such as additional signing algorithms and the ability for third parties to sign messages.

In order to keep up with the transition, we recently deployed a few improvements. First, new users will have the DomainKeys app disabled by default, and will instead use DKIM. Existing users will have their current settings maintained with the option to disable the DomainKeys app and enable the new DKIM app, but we recommend all users disable the DomainKeys app and let DKIM handle all your domain authentication needs going forward. Our support team is happy to help with the transition.

Switching from DomainKeys to DKIM will not have any impact on your deliverabilty. DKIM has been implemented by all the major email providers such as Yahoo and Google.

Let us know if you have any questions!


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As a Developer Evangelist for SendGrid, Brandon's focus is on empowering developers to build things, gathering feedback for new features and improvements, and fostering a cooperative developer community for anything that needs email integration.

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