Slimta
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Mail Transfer Library built on Python.
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The python-slimta project is a Python library offering the building blocks
necessary to create a full-featured MTA. Most MTAs must be configured, but
an MTA built with python-slimta is coded. An MTA built with python-slimta
can incorporate any protocol or policy, custom or built-in. An MTA built with
python-slimta can integrate with other Python libraries and take advantage of
Python's great community.
The python-slimta project is released under the MIT License. It is
tested for Python 3.6+.
Use a virtualenv to get started developing against python-slimta:
$ cd python-slimta/
$ python3 -m venv .venv
$ source .venv/bin/activate
(.venv)$ pip install -U pip wheel setuptools
To run the suite of unit tests included with slimta:
(.venv)$ pip install -r requirements-dev.txt
(.venv)$ py.test
The example in examples/slimta-mail.py provides a
fully functional mail server for inbound and outbound email. To avoid needing
to run as superuser, the example uses ports 1025, 1465 and 1587 instead.
It needs several things to run:
An activated virtualenv as created above in Getting Started.
A TLS certificate and key file. The easiest way to generate one:
openssl req -x509 -nodes -subj '/CN=localhost' -newkey rsa:1024 -keyout cert.pem -out cert.pemexamples/site_data.py config file.Check out the in-line documentation with --help, and then run:
(.venv)$ ./slimta-mail.py
Manually or with a mail client, you should now be able to deliver messages. On
port 1025, messages will go to unique files in the current directory. On port
1587, messages will be delivered to others using MX records! To try out a TLS
connection:
$ openssl s_client -host localhost -port 1587 -starttls smtp
If you want to fix a bug or make a change, follow the fork pull request model. We've had quite a few awesome contributors over the years, and are always open to more.
Special thanks to JocelynDelalande for extensive work bringing Python 3 compatibility to the project!
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