Can you tell me what might be going on with this text that I received?

I received a text from a name that I don’t have in my contacts. The name is in the part where I’d have the saved name but it’s definitely not in my contacts.

When I clicked on the text, there’s no number that it’s from and I can’t block the number because “block number” is not a choice.

There’s a ”.us” email in the body of the text with the word “hi” and nothing else. Of course I didn’t click on the email address.

Have you ever heard of a text from a name without a number, a contact that’s not saved in your phone?