Subject: Messages sent via mumi have no subject
From: Leo Famulari <[email-masked]>
To: [email-masked]
Date: Tue, 5 May 2020 12:13:45 -0400
List-Id: <debbugs-submit.debbugs.gnu.org>

I noticed that messages sent via the web form from mumi have no subject.
For example the subject's look like "bug#40587: (no subject)".