I was reading a mail from this list where I saw this footer:
Wikimedia-l mailing list, guidelines at: https://meta.wikimedia.org/wiki/Mailing_lists/Guidelines Wikimedia-l@lists.wikimedia.org https://meta.wikimedia.org/wiki/Mailing_lists/GuidelinesWikimedia-l@lists.wikimedia.org
The mailing list guidelines link redirect to a non-existing page link Perhaps, this link may be used: https://meta.wikimedia.org/wiki/Mailing_lists/Guidelines ?