Your request to majordomo was not processed because we have replaced
majordomo at this site with another maillist manager, mailman.
Mailman supports mail-based commands very similar to those of
majordomo, and in addition supports a web-based interface.

With the email-command interface, list-specific requests like
'subscribe' or 'who' *must* be sent to the list-specific '-request'
address for the particular list, e.g. 'matrix-sig-request@...'.

You can send general requests, like 'help' to get the list of
commands, or 'lists' for the list of maillists at this site, to
'mailman-request@.... You can also send these commands to the
'-request' address for any of the particular lists.

Alternately, you can use the list info web page for the list, eg

http://www.python.org/mailman/listinfo/matrix-sig

for list membership and subscription procedures.

If you have questions or need other help, contact the mailman
administrator at mailman-admin@....

Thanks!