[slyall]

Have you checked to make sure your domain wasn't previously owned by somebody else?

There are sites where you can lookup previous ownership such as https://whois-history.whoisxmlapi.com/

[ekjhgkejhgk]

What are you suggesting? That someone owned the domain, lost it, and after losing it tries to create a linkedin account with it?

[slyall]

Maybe they already had an account with that domain years ago and are trying to log back it.

Or perhaps it is just some random spammer creating linkedin accounts with random email addresses

Or perhaps the email doesn't actually come from linkedin and it is a phishing you to click though