[issue45299] SMTP.send_message() does from mangling when it should not

[Andrei Kulakov]

Andrei Kulakov <andrei.avk at gmail.com> added the comment:

Grant: sounds good! I can do the initial PR review. Note that the PR will need a test and a news entry. See the link below on authoring PRs:

https://devguide.python.org/pullrequest/

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