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
2991	Adding Message-ID header in core/mail.py	Graham King <graham@…>	Adrian Holovaty	"At the moment django.core.mail does not set a Message-ID header in the mails it sends.

    !SpamAssassin spots this and says INVALID_MSGID and /or MSGID_NO_HOST. With clustered mail servers (Exchange at least) if both members of the cluster receive a message without a message-id, they can think it is the same message and one of the messages will be dropped. I think the Message-ID is also used for message threading. Hence Message-ID is a good thing.

        I suggest changing django.core.mail.send_mass_mail to include the attached patch, which adds a Message-ID header according to the format recommended here:

http://www.jwz.org/doc/mid.html

http://rfc.sunsite.dk/rfc/rfc822.html
"	enhancement	closed	Core (Other)		normal	fixed			Unreviewed	0	0	0	0	0	0