Mailgun track unique opens

Question

Just tested mailgun through its API.

Everything is working fine.

Short: How to track unique opens for a specific mail through webhooks.

Answer 1

Best way to track email openings is so called "pixel". First you need to inject pixel in your email.

For example:

    public function insertPixel($user,$template)
        {
            $output = $template.'';

            return $output;
        }

Which points to php endpoint. At that endpoint you will get openings and do w/e you want with them.

For example:

public function actionTrack()
{
    if (isset($_GET["id"])&&isset($_GET["user"])){
            Yii::app()->db->createCommand("UPDATE mailing_campaigns SET open_count = open_count + 1 WHERE id=:id")
                ->bindParam(":id",$_GET["id"],PDO::PARAM_INT)
                ->execute();
    }
    header('Content-Type: image/gif');
    echo "\x47\x49\x46\x38\x37\x61\x1\x0\x1\x0\x80\x0\x0\xfc\x6a\x6c\x0\x0\x0\x2c\x0\x0\x0\x0\x1\x0\x1\x0\x0\x2\x2\x44\x1\x0\x3b";
    exit;
}

This code adjusts open's counter for mailing campaign for example and returns 1x1 transparent .gif image.

It's not 100% precise because some people not loading images in emails, but its best way I know so far.