postmark-python

The official (Beta) Python SDK for Postmark — send emails, manage bounces, templates, webhooks, and more.

For tutorials and detailed usage, check out the wiki.

For details about the Postmark API in general, see the Postmark developer docs.

Requirements

• Python 3.10+

Installation

Install from PyPI as postmark-python (the Python package you import is still postmark):

pip install postmark-python

Quick Start

The SDK is fully async. All API calls must be awaited.

import asyncio
import os

import postmark

# Tokens are read from the environment here. Optionally: pip install python-dotenv,
# then use load_dotenv() to populate os.environ from a .env file.

async def main():
    async with postmark.ServerClient(os.environ["POSTMARK_SERVER_TOKEN"]) as client:
        response = await client.outbound.send({
            "sender": "sender@example.com",
            "to": "recipient@example.com",
            "subject": "Hello from Postmark",
            "text_body": "Sent with the Postmark Python SDK.",
        })
        print(f"Sent: {response.message_id}")

asyncio.run(main())

Two Client Types

Client	Token	Use for
ServerClient	Server API token	Sending email, bounces, templates, stats, webhooks, streams
AccountClient	Account API token	Domains, sender signatures, managing servers, data removals

import postmark

# Use as async context managers to ensure connections are closed
async with postmark.ServerClient(os.environ["POSTMARK_SERVER_TOKEN"]) as client:
    ...

async with postmark.AccountClient(os.environ["POSTMARK_ACCOUNT_TOKEN"]) as account:
    ...

# Or call close() explicitly when done
client = postmark.ServerClient(os.environ["POSTMARK_SERVER_TOKEN"])
await client.close()

Development

git clone https://github.com/ActiveCampaign/postmark-python.git
cd postmark-python
poetry install
poetry run pre-commit install

# Run tests
poetry run pytest

# Lint and type-check
poetry run pre-commit run --all-files

Contributing

1. Fork the repository
2. Create a feature branch
3. Add tests for your changes
4. Ensure all checks pass (poetry run pre-commit run --all-files)
5. Open a Pull Request

Support

• Issues: GitHub Issues
• Postmark Support: support@postmarkapp.com

License

MIT — see LICENSE.