Setting up a webhook in PowerMTA allows you to receive real-time event notifications related to email delivery. Let’s walk through the steps to set up a webhook:
PowerMTA Transmissions API
- The Transmissions API enables you to submit emails for delivery via HTTP. Instead of using an SMTP client library, you can create a JSON object and post it to a URL.
- Here’s how to use the Transmissions API:
- Create an Email: Assemble your email content (headers, subject, text, HTML) and encode it according to MIME standards.
- Submit via API: Post the pre-built email JSON object to the Transmissions API endpoint.
- Note that PowerMTA expects the email to be already encoded for transmission, so you need to handle transfer encoding and MIME formatting.
PowerMTA Accounting Webhook
- The Accounting webhook allows you to push event data (e.g., bounces, complaints) to a web application.
- Key features of the Accounting webhook:
- Event Data: Receive data related to email events (receptions, deferrals, deliveries, bounces, complaints).
- Batched Posts: Events are posted as newline-delimited JSON or CSV batches.
- Retries: If errors occur during posting, the webhook retries the batch.
- Similar to event webhooks provided by SMTP delivery service providers.
Configuration of HTTP APIs
- Setting up the HTTP APIs is straightforward and explained in the PowerMTA User’s Guide.
- If you need HTTPS, consider setting up a validating certificate from Let’s Encrypt for endpoints and CA certificates for webhooks.
Remember that webhooks enhance your email delivery infrastructure by providing real-time insights and enabling seamless integration with other systems. Choose the integration method that aligns best with your organization’s goals and technical capabilities. 🚀
For more detailed implementation instructions, you can refer to the Postmastery article on HTTP-based APIs and webhooks in PowerMTA 5.0. Additionally, there’s an open-source PowerMTA Email API project on GitHub that demonstrates submitting emails to PowerMTA using HTTP and JSON. 📨
