[Mailman-Users] non-subscriber managed to post to a subscriber onlylist

Mark Sapiro mark at msapiro.net
Mon Jan 26 22:26:00 CET 2009

Steve Lindemann wrote:

>Had something strange occur early Saturday morning.  A non-subscriber 
>managed to successfully post to two member only lists (and, of course, 
>it was spam).
>The bogus sender (thelevisstoreonline at levis.rsys1.com) is not a member 
>of these member only lists and is not in the accept_these_nonmembers 
>filter.  Other non-member posts are being caught and sent to moderation. 
>  Is there something else that I should be looking at?

All the headers of the spam post. In a default installation, if any of
From:, Reply-To: or Sender: headers or the envelope sender as
reflected in the Unix From or Return-Path: header contains a member
address, the post will be deemed from that member.

Find the spam posts in archives/private/LISTNAME.mbox/LISTNAME.mbox.
The headers there should reflect the original except maybe for
Reply-To: if the list mungs that.

If that isn't the answer, then it is possible that, as Lindsay
suggests, the post contained an Approved: header with the list admin
or moderator password.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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