[Mailman-Users] non-subscriber managed to post to a subscriber only list (SOLVED)

Steve Lindemann steve at marmot.org
Mon Jan 26 23:44:35 CET 2009

Lindsay Haisley wrote:
> On Mon, 2009-01-26 at 15:26 -0700, Steve Lindemann wrote:
>> Thanks! Got it!  They spoofed a legitimate list member on the 
>> Return-Path:, which also showed up on the first ("From ") message header 
>> line.
> Both of these reflect the envelope sender address used in the SMTP
> dialog with the mail server.
>> I don't suppose there's anything we can do about this other than change 
>> that particular user's email address... is there?
> You can restrict the set of headers used to identify subscribers using
> the SENDER_HEADERS variable in mm_cfg.py, as Mark indicated.  By default
> (in Defaults.py) this is:
> SENDER_HEADERS = ('from', None, 'reply-to', 'sender')
> You can eliminate the envelope sender address from the mix by setting
> this simply to:
> SENDER_HEADERS = ('from', 'reply-to')
> or drop 'reply-to' if you want to be even more restrictive.

Thanks... I like that solution much more better 8^)

...too many messages going by too quickly.  I skimmed Mark's message but 
since he was answering Grant's question I didn't read it as closely as I 
should have.... I'm going back now to read thru the thread more slowly.

Thanks to all!
Steve Lindemann                         __
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