Linking Postmark as a source
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Skip the manual setup — run this in your project and the wizard auto-detects your databases and APIs and connects them to PostHog.
The Postmark connector syncs your transactional email data into PostHog, including outbound messages, inbound messages, bounces, templates, and message streams.
Schemas
| Schema | Description |
|---|---|
messages_outbound | Outbound email messages sent through Postmark |
messages_inbound | Inbound email messages received through Postmark |
bounces | Email bounces and delivery failures |
templates | Email templates configured in your Postmark server |
message_streams | Message streams for organizing email types |
Adding a data source
- Go to the Data pipeline page and select the Sources tab.
- Click New source and select Postmark.
- Enter your Postmark Server API token. You can find this in your Postmark dashboard under Servers > select your server > API Tokens.
- Optional: Add a prefix to your table names.
- Click Next.
The data warehouse then starts syncing your Postmark data. You can see details and progress in the data pipeline sources tab.
Sync limitations
- Full refresh only – Postmark syncs use full refresh mode. Incremental syncing is not currently supported.
- 10,000 row limit – The Postmark API caps each paginated endpoint at 10,000 rows. If you have more than 10,000 messages, bounces, or other records, only the most recent 10,000 are synced.
- Message retention – Postmark expires messages after a retention window (45 days by default), so historical data beyond that window is unavailable from the API.
Configuration
| Option | Type | Required |
|---|---|---|
Server API token | password | Yes |
Supported tables
| Table | Description | Sync method | Incremental field | Primary key |
|---|---|---|---|---|
messages_outbound | An outbound email message sent through Postmark. | Full refresh | — | — |
messages_inbound | An inbound email message received through Postmark. | Full refresh | — | — |
bounces | A bounce record for an email that could not be delivered. | Full refresh | — | — |
templates | An email template defined in Postmark. | Full refresh | — | — |
message_streams | A message stream that groups outbound or inbound messages in Postmark. | Full refresh | — | — |