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+# postmark
+
+[![Go Report Card](https://goreportcard.com/badge/github.com/pilinux/postmark)][01]
+[![CodeFactor](https://www.codefactor.io/repository/github/pilinux/postmark/badge)][02]
+[![codebeat badge](https://codebeat.co/badges/cd6b8c1c-c682-4535-9c15-e0c15124838d)][03]
+[![MIT license](https://img.shields.io/badge/license-MIT-brightgreen.svg)][04]
+
+## Real-time notifications from [Postmark][11] [webhooks][12]
+
+⚡ Receive notifications via webhooks
+⚡ Save events in MySQL / PostgreSQL / SQLite
+
+### Best use-case
+
+⚡ Handle repeated abuses on the application-side before
+sending transactional emails to a fake/bad email address
+
+### Features
+
+Version: `0.1.0`
+
+| Message type  | Supported          |
+| ------------- | ------------------ |
+| Transactional | :white_check_mark: |
+| Inbound       | :x:                |
+| Broadcasts    | :x:                |
+
+### Setup
+
+- You need a MySQL / PostgreSQL instance, or you can use SQLite
+- Download the binary `go install github.com/piLinux/postmark@latest`
+- Create a free project on [Sentry][13] to track errors
+  - Choose `Go` as the platform
+  - Save the `DNS` (format: `https://secret_code@abc.ingest.sentry.io/secret_number`)
+- Change the filename from `.env.sample` to `.env`
+- Update the following variables in the `.env` file (DO NOT DELETE other non-used variables)
+  - `APP_PORT`
+  - `SentryDSN`
+  - `USERNAME`
+  - `PASSWORD`
+  - `DBDRIVER`
+  - `DBUSER`
+  - `DBPASS`
+  - `DBNAME`
+  - `DBHOST`
+  - `DBPORT`
+  - `DBTIMEZONE`
+- Execute the binary file. It will automatically create a new table
+  `postmark_outbounds` and migrate the database.
+- On Postmark,
+  - select your server and browse the `transactional` message stream
+  - select `Add webhook`
+  - add the following information:
+    - Webhook URL: `http(s)://<your_ip_or_domain:port>/webhooks/v1/outbound-events`
+      If you run the application behind a reverse proxy (NGINX / Apache) and configure a
+      domain, then the URL will be `http(s)://<your_domain>/webhooks/v1/outbound-events`
+    - add `Basic auth credentials`
+    - select the events Postmark should forward to your server
+
+### `postmark_outbounds` database
+
+| Name          | Comment                                                               |
+| ------------- | --------------------------------------------------------------------- |
+| `id`          | primary key                                                           |
+| `created_at`  | data creation time in the database                                    |
+| `updated_at`  |                                                                       |
+| `deleted_at`  |                                                                       |
+| `record_type` | Delivery / Bounce / SpamComplaint / Open / Click / SubscriptionChange |
+| `type`        | HardBounce / SpamComplaint                                            |
+| `type_code`   | 1 (for bounce) / 100001 (for spam complaint) / 0 (others)             |
+| `message_id`  | Postmark message ID                                                   |
+| `tag`         | user-defined tag                                                      |
+| `from`        | from email                                                            |
+| `to`          | destination email                                                     |
+| `event_at`    | timestamp from Postmark                                               |
+| `server_id`   | Postmark server ID                                                    |
+
+## License
+
+&#169; piLinux 2022
+
+Released under the [MIT license][04]
+
+This project is built with [GoREST][21].
+
+[01]: https://goreportcard.com/report/github.com/pilinux/postmark
+[02]: https://www.codefactor.io/repository/github/pilinux/postmark
+[03]: https://codebeat.co/projects/github-com-pilinux-postmark-main
+[04]: LICENSE
+[11]: https://postmarkapp.com
+[12]: https://postmarkapp.com/developer/webhooks/webhooks-overview
+[13]: https://sentry.io
+[21]: https://github.com/piLinux/GoREST