id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
28971	EmailMessage.message() does not override Cc header from extra_headers dict (unlike From, To, and Reply-To)	Jon Dufresne	nobody	"Compare how CC is built:

https://github.com/django/django/blob/2.0/django/core/mail/message.py#L259

To how the other headers are built:

- https://github.com/django/django/blob/2.0/django/core/mail/message.py#L256
- https://github.com/django/django/blob/2.0/django/core/mail/message.py#L257
- https://github.com/django/django/blob/2.0/django/core/mail/message.py#L261

Notice, unlike the others, Cc does not first use the `.extra_headers` dict. Like the other headers, should be able to use the `.extra_headers` to override Cc.

[https://github.com/django/django/pull/9454 PR]"	Cleanup/optimization	closed	Core (Mail)	dev	Normal	fixed			Ready for checkin	1	0	0	0	0	0