[IMP] Prevent bare line feed rejection errors

[NICO-SOLUTIONS]

• Use CRLF line endings to avoid 550 5.6.11 SMTP errors

Pull Request Checklist

• Pull request includes a changelog file. The entry should:
  • Be a short description of your change which makes sense to users. "Fix a bug that prevented receiving messages from other servers." instead of "Move X method from EventStore to EventWorkerStore.".
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[anoadragon453]

Thank you for your contribution!

I'm surprised this wasn't flagged earlier. I suppose most mail server implementations are forgiving of non-CRLF line endings?

[NICO-SOLUTIONS]

Thank you for your contribution!

I'm surprised this wasn't flagged earlier. I suppose most mail server implementations are forgiving of non-CRLF line endings?

@anoadragon453
you´re welcome.

it is possible, that some mail providers accept it. I just noticed the problem with 365 Exchange accounts. Thats why is was trying to find the culprit. SHoudl be the right spot for the changes.

[anoadragon453]

According to Python's docs, the recommended way to construct an email is:

In general, you will want to use the email package’s features to construct an email message, which you can then send via send_message(); see email: Examples.

But this is fine for now.

[anoadragon453]

Packaging CI failure is unrelated to this PR.