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The official Postmark Slack App

Even though you can currently use Zapier to get notifications for a variety of Postmark events, we’re currently working on expanding your options for getting notified of bounces and ways to handle them. So one of the (many!) projects we worked on during our hack weeks at the beginning of the year is an official Postmark Slack App, and we’re happy to announce that it’s now live and ready to use. This is just the beginning, and we have some big plans for expanding it. For now, here is what you can do with the app.

Bounce notifications #

Send Bounce notification messages from Postmark to a Slack channel of your choice. Each notification also provides a direct link to the Message Details page so that you can investigate further.

/postmark command #

We'll continue to add more functionality to the /postmark slash command, but for now here's what you can do:

  • /postmark status --> Provides the current status of Postmark's services, with basic incident details and a link to view the full incident page
  • /postmark docs --> Post a URL to the API documentation for easy access

Installation #

Installation is really simple:

Step 1 #

Click the "Add to Slack" button below, and select a channel you would like to post Bounce notifications to. Don't worry, the /postmark command will work in any channel.

Add to Slack

Step 2 #

Once you authenticate successfully, you will receive a message in Slack with your unique bounce webhook URL. You'll only get this message once, so please save the URL immediately.

To see bounce notifications in your chosen channel you need to add that URL to the Bounce Webhook field in your Postmark account (Settings / Outbound).

Step 3 #

Enjoy! Please let us know if you run into issues, and if there are other things you'd like the Postmark Slack App to do.

Notes, limitations, next steps… #

Here are a couple of things to keep in mind as you use the app:

  • You can currently only specify one bounce webhook URL per Postmark server. We know that means that you may not be able to add the Slack App's URL since you may already have a different webhook URL in use. We'll be working on a solution for this limitation.
  • To stop receiving bounce notifications, remove the URL from your Postmark account.

We have quite a few plans for expanding the app (such as showing recent stats, showing recent activity for a specific email address), but we really want to know what you think as well. What do you think we should add? What would you like the app to do? Let us know at

Rian van der Merwe

Rian van der Merwe

Product person. Lover of family, coffee, and vinyl records.