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

[Andrei Kulakov]

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

Seems like a reasonable request to me.

I can make the PR+test.

To minimize backwards-incompatible change, we can pass `_mangle_from=policy._mangle_from` argument instead of passing the entire policy. Is that a good idea or passing the policy argument should be fine too?

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nosy: +andrei.avk, r.david.murray
stage:  -> needs patch
type:  -> behavior
versions: +Python 3.10, Python 3.11

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