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Gandi - Authenticate your domain

As explained in our dedicated article Authenticate your domain to improve the deliverability of your emails (SPF, DKIM, DMARC), you must add DNS records to your web host to authenticate your domain.

In this article, we will explain how to authenticate your domain on Gandi.

Before you start

👆Step 1: Access the Domains page

To access the Domains page:

  1. In Sendinblue, click on your name at the top-right side of the screen.
  2. Select Senders & IP.
  3. Click Domains.

⚙️ Step 2: Generate the DNS records

To generate the DNS records that you will use to authenticate your domain:

If you haven't added your domain yetIf you already added your domain
  1. Click Add a domain.
  2. Enter the domain name you wish to use to sign your emails and click Save. In our example, we are using the domain
  3. The DNS records (Sendinblue code, DKIM, and SPF) that need to be added to your domain host display.

🚀 Step 3: Add the DNS records to your domain host

❗️ Important
A domain can only have one SPF record. If you need to add more than one SPF record to a domain, you should add a new rule to your existing SPF record instead of creating a new record. Learn more in our dedicated article Merging multiple SPF records.

If you haven't verified your domain before, follow Step 2 from our dedicated article Verify your domain. We highly recommend using DNS records to verify your domain as it allows you to verify and authenticate your domain simultaneously.

  1. Open a new window in your navigator and access your Gandi account.
  2. In the sidebar menu, select Domain.
  3. Select the subdomain or domain that you want to delegate.
  4. Go to the DNS Records tab.
  5. Click Add record.
  6. Create two DNS entries of TXT type: DKIM and SPF. 
  7. In the Name field, paste the hostname as it appears under DKIM record and SPF record, respectively.
    • For a subdomain, enter its name
    • For a domain, enter @ followed by its name
  8. In the Hostname field, paste the generated Value code under DKIM record and SPF record, respectively.
  9. Leave the TTL and Unit fields as is and click Save
    ❗️ Important
    It may take up to 24-48 hours for DNS changes to propagate fully.
  10. Go back to Sendinblue and click Verify & Authenticate or Authenticate. 
  11. Once the configuration is complete, a green check appears next to the Value fields for DKIM and SPF records.

Your domain has been authenticated, and your emails will now be signed with your own domain name in your recipients' mailbox! 🚀⬇️


⏭ What's next?

🤔 Have a question?

If you have a question, feel free to contact our support team by creating a ticket from your account. If you don't have an account yet, you can contact us here.