concrete/src/Mail/Service.php
public function to($email, $name = null)
    {
        if (strpos($email, ',') > 0) {
            $email = explode(',', $email);
            foreach ($email as $em) {
                $this->to[] = [$em, $name];
            }
        } else {
            $this->to[] = [$email, $name];
        }
    }
public function to($email, $name = null)
    {
        if (strpos($email, ',') > 0) {
            $email = explode(',', $email);
            foreach ($email as $em) {
                $this->to[] = [$em, $name];
            }
        } else {
            $this->to[] = [$email, $name];
        }
    }
public function to ( $ email , $ name = null ) { if ( strpos ( $ email , ',' ) > 0 ) { $ email = explode ( ',' , $ email ) ; foreach ( $ email as $ em ) { $ this -> to [ ] = [ $ em , $ name ] ; } } else { $ this -> to [ ] = [ $ email , $ name ] ; } }
Add one or more "To" recipients to the message.

@param string $email (separate multiple email addresses with commas)
@param string|null $name The name to associate to the email address
Add one or more To recipients to the message .