python-smime-email

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Generate x509 SMIME signed emails with ease!

Usage

  1. Generate the email raw content

    import smime_email

data = b"Hello!"
SMIME_KEY = smime_email.load_key("key_path.pem")
SMIME_INTERMEDIATE = smime_email.load_certificates("intermediate_path.pem")
SMIME_CERT = smime_email.load_certificates("cert_path.pem")[0]
email_raw_bytes = smime_email.get_smime_attachment_content(data, SMIME_KEY, SMIME_INTERMEDIATE, SMIME_CERT)

  2. Send it using any email library you like. Here is an example as Django email backend

    email_raw_bytes = smime_email.get_smime_attachment_content(data, SMIME_KEY, SMIME_INTERMEDIATE, SMIME_CERT)
# ...
class EmailBackend(BaseEmailBackend):
    def send_messages(self, message) -> int:
        with smtplib.SMTP(settings.EMAIL_HOST, settings.EMAIL_PORT) as server:
            server.sendmail(message.from_email, message.to, email_raw_bytes)
        return 1

Development

The code is formatted with ruff and checked with various linters. To run the whole linting and formatting process, run uv run poe all.

License

Code and documentation copyright 2024-2025 Siemens AG.

See LICENSE.md.

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Owner

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4 maintainers

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Credits

Author: Siemens

License expression

MIT
View SPDX License List

Requires

Python <4, >=3.10

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