How to validation business email in Contact Form 7?

See https://contactform7.com/2015/03/28/custom-validation/

My question is not about confirm email.
it is validation of business email

(i.e) if i entered [email protected] (or)[email protected]
It will throw error message “Please enter business emails”

Not only gmail and yahoo it was just an example

So the valid emails are [email protected]

I fount one solution from internet

// Add custom validation for CF7 form fields
function is_company_email($email){ // Check against list of common public email providers & return true if the email provided *doesn’t* match one of them
if(
preg_match(‘/@gmail.com/i’, $email) ||
preg_match(‘/@hotmail.com/i’, $email) ||
preg_match(‘/@live.com/i’, $email) ||
preg_match(‘/@msn.com/i’, $email) ||
preg_match(‘/@aol.com/i’, $email) ||
preg_match(‘/@yahoo.com/i’, $email) ||
preg_match(‘/@inbox.com/i’, $email) ||
preg_match(‘/@gmx.com/i’, $email) ||
preg_match(‘/@me.com/i’, $email)
){
return false; // It’s a publicly available email address
}else{
return true; // It’s probably a company email address
}
}

function custom_email_validation_filter($result, $tag) {

$tag = new WPCF7_Shortcode( $tag );

if ( ‘company-email’ == $tag->name ) {

$the_value = isset( $_POST[‘company-email’] ) ? trim( $_POST[‘company-email’] ) : ”;

if(!is_company_email($the_value)){
$result->invalidate( $tag, “Please Enter a valid Business Email ID” );
}
}
return $result;
}

add_filter( ‘wpcf7_validate_email’, ‘custom_email_validation_filter’, 10, 2 );
add_filter( ‘wpcf7_validate_email*’, ‘custom_email_validation_filter’, 10, 2 );

is this correct?