Comment 5 for bug 266324

anonymous_list = True
 no info about original sender left in archives, but there
is an entry 'post to hgsa-web-updates from xxx anonymized'
in the 'post' log which will at least tell you the From:
value, although that isn't guaranteed to be the 'member'
that was accepted. But anyway, chack that address in the
Membership list and verify that it is moderated.

Or you can see FAQ 3.62 at
http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq03.062.htp
for a pointer to a script that can screen-scrape the admin
web interface and enable you to easily find any unmoderated
members. Note that if there are any at all, your list is
vulnerable to spoofing, even inadvertently by some half
brain dead autoresponder. As one possibility, is the fixed
reply-to '<email address hidden>' an unmoderated member?