Comment 2 for bug 724318

This user was unaware that sending emails to a launchpad list does go directly the Launchpad's mailman. The mail was not forwarded to the subscribers. It was not archived. It was not moderated because of Launchpad's own handler. Launchpad discards any message that does not come from a Launchpad user.
    http://bazaar.launchpad.net/~launchpad-pqm/launchpad/devel/view/head:/lib/lp/services/mailman/monkeypatches/lphandler.py

The crucial issue is that
    msg.get_sender()
is not returning the email address (<email address hidden>). WIthout an exact match, Lp will tell mailman to discard the message.

Thank you for a second reading of the encoded name. I neglected to see that the name order was reversed. I agree that this is a dupe of bug 702516.