Got it. The trick is to send a message like this:
To: list-request Subject: subscribe <someaddress> where the domain part for <someaddress> starts with a number. Ok. I'm going to forward this upstream and fix it in the debian package. Thanks a lot. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
