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API updates

Custom metadata for your emails

You can now add custom metadata to your emails, and we'll pass that same data back to your system through our webhooks.

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For more details on how to implement and use this feature, check out the announcement blog post, help documentation as well as our updated developer documentation.

March, 2018

Modular webhooks

You can now add multiple webhook URLs for a server and choose which events you’d like to send to each specified URL.

December, 2016

Webhook for delivery events

Postmark can now notify your application of delivery events via webhooks so you can do a variety of things like feed delivery events into an internal system, provide delivery even notifications to your customers, or aggregate delivery even data to see patterns and respond accordingly.