opentracking.gractions.com is a subdomain that likely served as a tracking endpoint for email campaigns or analytics. Right now it returns a 404 error, meaning there's no active website to visit. That alone isn't a scam indicator, but it does mean you can't verify what the site looked like or what data practices were in place.
For a tracking service, transparency is important because these systems can collect information like whether you opened an email or clicked a link. Legitimate tracking providers usually have an about page, a privacy policy, and at least basic contact information. This subdomain has none of those.
On the positive side, the domain has been around since at least 2017, the SSL certificate is valid, and no blacklists or Google warnings are associated with it. The hosting on Microsoft's network is also a neutral to positive sign.
If you see opentracking.gractions.com in an email's tracking pixel or a link, the main risk is that you don't know who operates it or how your data is handled. For most people, this is a reason to treat the email with caution rather than outright suspicion. Verified.fyi suggests you avoid clicking embedded links from unknown senders that route through this domain until more is known about the parent company behind gractions.com.