Souke/common/helpers/Mail.php

<?php

namespace common\helpers;

use Yii;

class Mail {
    public static function send($email, $subject, $view, $data) {
        $mail = Yii::$app->mailer->compose(
            [   'html' => $view.'-html', 
                'text' => $view.'-text'
            ], 
            $data)
        ->setTo($email)
        ->setFrom(['contact@laboiteapain.net' => 'La boîte à pain'])
        ->setSubject('[La boîte à pain] '.$subject)
        ->send();
    }
}