How to authenticate your domain name on IONOS

Here is how to authenticate your domain when it is registered with IONOS.

You will need a domain at IONOS.

If you send your emails with SleepPRO™

Step 1: get your records in SleepPRO™

1. Click your profile picture, then Settings, then Emails.
2. In the Domains section, click Click here to authenticate your domain and display its information in your email header.
3. Enter your domain without www, for example yoursleepbusiness.com, and click Save.
4. Refresh the page and click the eye icon. You will see three CNAME records and one TXT record (your DMARC record). See How to create a DMARC record.

Step 2: add the records in IONOS

Stuck at any point? IONOS's support team can help.

1. Log in to IONOS and choose your domain.
2. Click DNS, then Add a record.
3. Choose CNAME.
4. In Hostname, paste the name from SleepPRO™, keeping only the part before your domain. If SleepPRO™ shows si942517.yoursleepbusiness.com, enter si942517.
5. In Target (Point to), paste the value from SleepPRO™ and add a full stop at the end.
6. Click Save.
7. Repeat for the other two CNAME records.
8. Add a record, choose TXT, and enter _dmarc as the hostname and the DMARC value from SleepPRO™, which looks like v=DMARC1; p=none; rua=mailto:you@yoursleepbusiness.com. Click Save.

Step 3: check your records

1. Open DNS Checker (dnschecker.org) and enter the full name of each CNAME record, including your domain.
2. A green tick next to the right value for all three means your domain is authenticated.
3. Red results mean something is off. Check your DNS settings, or contact SleepPRO™ support with a screenshot of your records.
4. Check your DMARC record with a DMARC checker, such as mxtoolbox.com/dmarc.aspx, by searching your domain.

If you use your own SendGrid account

Contact SendGrid support for how to authenticate your IONOS domain in SendGrid.