Penny reported having found that emails from Forum are not being added an "id" in Header. That's a problem for mail filtering tools which often rely in this headers to classify emails coming from different forums.

Eloy comment on this:

"in old messages (forum) we used to add these:

List-Id: "Databases" <moodleforum28@moodle.org>
List-Help: http://moodle.org/mod/forum/view.php?f=28
Message-ID: <moodlepost697853@moodle.org>
In-Reply-To: <moodlepost0@moodle.org>
References: <moodlepost0@moodle.org>
X-Course-Id: 5
X-Course-Name: Using Moodle

All them are missing in 2.0."