By default, the email validation rule will accept an email without tld domain (ie: taylor@laravel, povilas@ldaily)
But if you want to make sure the email must have a tld domain (ie: [email protected], [email protected]), use email:filter rule.
[ 'email' => 'required|email', // before 'email' => 'required|email:filter', // after],
Tip given by @Chris1904