How to send email in yii2 with read receipt via gmail?

Question

gmail

I use Yii to send mail via gmail:

Yii::$app->set('mailer', [
            'class' => 'yii\swiftmailer\Mailer',
            'transport' => [
                'class' => 'Swift_SmtpTransport',
                // Values from db
                'class' => 'Swift_SmtpTransport',
                'host' => 'smtp.gmail.com',
                'username' => $username,
                'password' => $password,
                'port' => '587',
                'encryption' => 'tls',
            ],
        ]);

There is a task to learn an amount of the viewed letters.
In Gmail, you can send an email with a read receipt.
Is it possible to send it via mailer in yii2?

Answer 1

In Gmail, you can send an email with a read receipt.

As far as I remember, this is only in corporate mail.
You can create a unique ID for each letter and insert a 1x1 image

<img src="/api/markAsRead?accessToken=xxx&user=yyy&emailId=zzz">