Would you pick up on this if you were in a hurry and happen to be expecting a package? (imagine it's in English ๐ ) What immediately catches your eye?
That isn't weird. This should be default behavior for everyone. If it was fewer people would get caught by scams. I also look at the sender's email. All the ones I've ever received have come from domains not affiliated with the company they purport to represent. I've taught all my non-security savvy friends to do this, too.