Email Domain Authentication (DKIM) in Gandi – Strikingly Help Center

Go to your Strikingly site editor and click "Settings" > "Email Notifications".
Add your email to the "From Email" field.
Enter the 6-digit code sent to your email to verify it.
Click “Authenticate Email Domain”
Choose “Gandi” as your domain provider, and click “Start Configuration”.
You will see a popup that displays the records you'll need to set in your domain settings.

In your Gandi account, click “Domain” on the left.
Select your domain.
Click the "DNS record" tab in the top bar menu.
Click “Add record” button.
Under Type, select CNAME.
Copy and paste the first CNAME record.
Specifically, copy the “Name” from Strikingly and paste it to “Name”, and copy the “Value” from Strikingly and paste to “Hostname”.
Leave the TTL field at its default setting.
Repeat steps 4-7 to add two more CNAME records.
Add one more record and set the Type to TXT.
Copy and paste the “Name” and “Value” of the TXT record.
Leave the TTL field at its default setting.

After you’ve confirmed the above setup, go back to your Strikingly site editor and click the "I've added, start checking" button in the popup.
We’ll automatically detect your DNS records. please allow up to 48 hours for the changes in the domain records to take effect globally.
After we detect the correct values, you’ll be notified by email immediately. You’ll also see a green message here, indicating that you've successfully set up DKIM authentication for your domain.
If we can’t detect the correct values after 48 hours, you’ll be notified by email. You’ll need to make sure that you’ve completed Steps 1-3 and try again. As always, you can contact us for support!