#35581: Upgrade django.core.mail to use Python's modern email API
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Reporter: Mike Edmunds | Owner: Mike
Type: | Edmunds
Cleanup/optimization | Status: assigned
Component: Core (Mail) | Version: dev
Severity: Normal | Resolution:
Keywords: email, compat32 | Triage Stage: Accepted
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Comment (by Mike Edmunds):
The PR includes a few changes that weren't covered by the original
[https://groups.google.com/g/django-developers/c/2zf9GQtjdIk deprecation
plan] from the django-developers discussion:
1. **Deprecated MIMEBase attachments:** I had [https://groups.google.com/g
/django-developers/c/2zf9GQtjdIk/m/LcBfqfizAAAJ originally proposed]
continuing support for legacy MIMEBase attachments without deprecation.
But it turns out the modern API's email.message.MIMEPart is a good
replacement, so the PR puts MIMEBase on the usual deprecation path. I've
also added a docs example of using MIMEPart for inline images.
2. **Dropped undocumented subtype attributes:** Removed support for the
undocumented `EmailMessage.mixed_subtype` and
`EmailMultiAlternatives.alternative_subtype` attributes. (But it will
raise an error on attempts to use them.)
3. **Dropped undocumented encoding=Charset():** The legacy code allows
setting the undocumented `EmailMessage.encoding` property to a legacy
email.charset.Charset object. There's no way to make that work with the
modern APIs, so I've dropped it. (You can still set encoding to a string
charset name, and that works properly.)
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Ticket URL: <https://code.djangoproject.com/ticket/35581#comment:19>
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