Yii\log\EmailTarget, all errors except 404?

Question

Yii

Actually, the question in the title is how to make sure that all errors except 404 are sent to the mail?
My, quite standard config

'log' => [
            'traceLevel' => YII_DEBUG ? 3 : 0,
            'targets' => [
                [
                    'class' => 'yii\log\FileTarget',
                    'levels' => ['error', 'warning'],
                ],
                [
                    'class' => 'yii\log\EmailTarget',
                    'mailer' => 'mailer',
                    'levels' => ['error', 'warning'],
                    'message' => [
                        'from' => ['[email protected]'],
                        'to' => ['[email protected]'],
                        'subject' => 'Log message',
                    ],
                ],
            ],
        ],

Answer 1

...
'email' => [
                    'class' => EmailTarget::class,
...
                    'except' => [
                        'yii\web\HttpException:404',
                    ],
                ],