
Official Mailtrap Python client
This Python package offers integration with the official API for Mailtrap.
Add email sending functionality to your Python application quickly with Mailtrap.
Compatibility with previous releases
Versions of this package up to 1.0.1 were different, unrelated project, that is now maintained as Sendria. To continue using it, see instructions.
Installation
Prerequisites
Install package
pip install mailtrap
Usage
Minimal usage (Transactional sending)
import mailtrap as mt
API_TOKEN = "<YOUR_API_TOKEN>"
client = mt.MailtrapClient(token=API_TOKEN)
mail = mt.Mail(
sender=mt.Address(email="sender@example.com", name="John Smith"),
to=[mt.Address(email="recipient@example.com")],
subject="You are awesome!",
text="Congrats for sending test email with Mailtrap!",
)
client.send(mail)
Sandbox vs Production (easy switching)
Mailtrap lets you test safely in the Email Sandbox and then switch to Production (Sending).
Remove the inbox_id field or set it to None. Then, remove the sandbox field or set it to False.
You can change the arguments in the code or via another way. Here is an example using environment variables.
Set next environment variables:
MAILTRAP_API_KEY=your_api_token
MAILTRAP_USE_SANDBOX=true
MAILTRAP_INBOX_ID=123456
Bootstrap logic:
import os
import mailtrap as mt
API_KEY = os.environ["MAILTRAP_API_KEY"]
IS_SANDBOX = os.environ.get("MAILTRAP_USE_SANDBOX", "true").lower() == "true"
INBOX_ID = os.environ.get("MAILTRAP_INBOX_ID")
client = mt.MailtrapClient(
token=API_KEY,
sandbox=IS_SANDBOX,
inbox_id=INBOX_ID,
)
mail = mt.Mail(
sender=mt.Address(email="sender@example.com", name="John Smith"),
to=[mt.Address(email="recipient@example.com")],
subject="You are awesome!",
text="Congrats for sending test email with Mailtrap!",
)
client.send(mail)
Bulk stream example (optional) differs only by setting bulk=True:
bulk_client = mt.MailtrapClient(token=API_KEY, bulk=True)
Recommendations:
- Use separate API tokens for Production and Sandbox.
- Keep initialisation in a single factory object/service so that switching is centralised.
Full-featured usage example
import base64
import os
from pathlib import Path
import mailtrap as mt
client = mt.MailtrapClient(token=os.environ["MAILTRAP_API_KEY"])
welcome_image = Path(__file__).parent.joinpath("welcome.png").read_bytes()
mail = mt.Mail(
sender=mt.Address(email="mailtrap@example.com", name="Mailtrap Test"),
to=[mt.Address(email="your@email.com", name="Your name")],
cc=[mt.Address(email="cc@email.com", name="Copy to")],
bcc=[mt.Address(email="bcc@email.com", name="Hidden Recipient")],
subject="You are awesome!",
text="Congrats for sending test email with Mailtrap!",
html="""
<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body style="font-family: sans-serif;">
<div style="display: block; margin: auto; max-width: 600px;" class="main">
<h1 style="font-size: 18px; font-weight: bold; margin-top: 20px">
Congrats for sending test email with Mailtrap!
</h1>
<p>Inspect it using the tabs you see above and learn how this email can be improved.</p>
<img alt="Inspect with Tabs" src="cid:welcome.png" style="width: 100%;">
<p>Now send your email using our fake SMTP server and integration of your choice!</p>
<p>Good luck! Hope it works.</p>
</div>
<!-- Example of invalid for email html/css, will be detected by Mailtrap: -->
<style>
.main { background-color: white; }
a:hover { border-left-width: 1em; min-height: 2em; }
</style>
</body>
</html>
""",
category="Test",
attachments=[
mt.Attachment(
content=base64.b64encode(welcome_image),
filename="welcome.png",
disposition=mt.Disposition.INLINE,
mimetype="image/png",
content_id="welcome.png",
)
],
headers={"X-MT-Header": "Custom header"},
custom_variables={"year": 2023},
)
client.send(mail)
Minimal usage of email template
import os
import mailtrap as mt
client = mt.MailtrapClient(token=os.environ["MAILTRAP_API_KEY"])
mail = mt.MailFromTemplate(
sender=mt.Address(email="mailtrap@example.com", name="Mailtrap Test"),
to=[mt.Address(email="your@email.com")],
template_uuid="2f45b0aa-bbed-432f-95e4-e145e1965ba2",
template_variables={"user_name": "John Doe"},
)
client.send(mail)
Sending email directly via SendingApi
This approach is newer. It can be useful when you expect the response to be model-based rather than dictionary-based, as in MailtrapClient.send().
import os
import mailtrap as mt
client = mt.MailtrapClient(token=os.environ["MAILTRAP_API_KEY"])
sending_api = client.sending_api
mail = mt.Mail(
sender=mt.Address(email="sender@example.com", name="John Smith"),
to=[mt.Address(email="recipient@example.com")],
subject="You are awesome!",
text="Congrats for sending test email with Mailtrap!",
)
sending_api.send(mail)
Mailtrap sending responses difference
1. client.send()
Response:
{
"success": True,
"message_ids": ["5162954175"]
}
2. client.sending_api.send()
Response:
SendingMailResponse(success=True, message_ids=["5162955057"])
The same situation applies to both client.batch_send() and client.sending_api.batch_send().
Supported functionality & Examples
Email API:
Email Sandbox (Testing) API:
Contacts API:
Email Templates API:
Sending Domains API:
Suppressions API:
General API:
Contributing
Bug reports and pull requests are welcome on GitHub. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.
Development Environment
Clone the repo
git clone https://github.com/mailtrap/mailtrap-python.git
cd mailtrap-python
Install tox
tox is an environment orchestrator. We use it to setup local environments, run tests and execute linters.
python -m pip install --user tox
python -m tox --help
To setup virtual environments, run tests and linters use:
tox
It will create virtual environments with all installed dependencies for each available python interpreter (starting from python3.9) on your machine.
By default, they will be available in {project}/.tox/ directory. So, for instance, to activate python3.11 environment, run the following:
source .tox/py311/bin/activate
Information for version 1 users
If you are a version 1 user, it is advised that you upgrade to Sendria, which is the same package, but under a new name, and with new features. However, you can also continue using the last v1 release by locking the version in pip:
pip install --force-reinstall -v "mailtrap==1.0.1"
License
The project is available as open source under the terms of the MIT License.
Code of Conduct
Everyone interacting in the Mailtrap project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct