Sorting bugmail from the Bazaar project

[Andrew Bennetts]

Elliot Murphy wrote:
> Hi!
> 
> I think there are two kinds of bug mail notifications that get sent from
> the Launchpad Bazaar project. One because I'm personally involved with a
> bug somehow (reporter, subscriber, assignee, etc). The other because I
> am a member of the Bazaar Developers team in Launchpad.
> 
> Unfortunately, I can't tell these mails apart, and I'd really like to be
> able to sort them for handling at different priorities. I want to

What about the X-Launchpad-Message-Rationale header?  Recently I've started
seeing this header in some bug mail:

    X-Launchpad-Message-Rationale: Registrant (Bazaar) @bzr

(and also a plain English comment in the signature of the message too: "You
received this bug notification because you are a member of Bazaar Developers,
which is the registrant for Bazaar.")

-Andrew.