After you add your domain, Simplesat will provide you with the necessary DNS entries to add.
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The domain authentication process differs for each registrar, but the overall instructions are the same: add three separate CNAME records.

Here's an example of Simplesat DNS entries:

Start off by logging into your DNS registrar dashboard.

This looks different depending on the registrar you use. But usually there's a place to add DNS records.
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Add the 3 records displayed in Simplesat as CNAME records.
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Most of the time the registrar will automatically append your domain name to the record. So to create a CNAME record for these settings:

You'll only need to fill in these values:

Here's roughly what that will look like:

Repeat this for all 3 records. Once that's done click save.

Your DNS settings may take a few minutes to up to an hour to propagate.

Head back to Simplesat's email settings page and click validate DNS records to verify if it's set up correctly.

To troubleshoot failed DNS entries, you can use this handy DNS lookup tool or other similar tools to find more about what the problem is.
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If you have any questions or need assistance in doing this, just let us know. We'll be happy to help walk you through the process.
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📖 Authenticating domains for email delivery
📖 Is it possible to have a different DKIM selector if I already use SendGrid for another service?
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