Mozilla's "mailman" servers, and the crazy mail/NNTP/WebForums mirroring,
are being decommissioned soon and this list will no longer work. Most such
lists are being migrated to https://discourse.mozilla.org for web-based
forums, but as there are already discussions on this topic there this list
is not being migrated as-is.
To continue Mozilla-related security discussions please continue on at
"chat" on Matrix
<a href="https://chat.mozilla.org/#/room/#security:mozilla.org">https://chat.mozilla.org/#/room/#security:mozilla.org (there are also dedicated desktop and mobile matrix clients that will work)