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

Ok I think I got an acceptable workflow - through the “custom variables”.

You can define different values for each recipient, so you can send a unique id and then track that id on the open events. And just save one open for each sender or update the open time.

My sending code (PHP):

$result = $mg->sendMessage($domain, array(
            'from'    => 'foo@bar.de>',
            'to'      => 'recipient1@mail.de, recipient2@mail.de',
            'subject' => 'Hello %recipient.first% from %recipient.group%!',
            'text'    => 'Test of Mailgun',
            'html'    => 'It is so simple to send a message.
Right?',
            'o:tag'   => array('test'),
            'o:tracking-opens' => 'yes',
            'v:my-custom-data' => '{"my_message_id": %recipient.id%}',
            'recipient-variables' => '{
                "recipient1@mail.de": {"first":"Recipient1", "group":"group1", "id":1},
                "recipient2@mail.de": {"first":"Recipient2", "group":"group2", "id":2}
            }'
));

Then in each event you get a response with the unique ids.

Open event of first email:

"user-variables": {
    "my-custom-data": "{\"my_message_id\": 1}"
},

Open event of second email:

"user-variables": {
    "my-custom-data": "{\"my_message_id\": 2}"
},