Mark:

About the list's accept_these_non-members, I have ten email address that I put there for people who want to send from multiple emails but only want to receive posts at one of those addresses. None of them resemble the problem address.
I'll do the testing you suggest and report what I find.

Skipper


Mark Sapiro wrote:
Robert Boyd Skipper wrote:
Thank you for this info.  I'll see if I have access to
archives/private/LIST.mbox/List.mbox.


If you don't have direct access to the file on host, you can get it via
the web with a URL like
<http://www.example.com/Mailman/private/LIST.mbox/LIST.mbox>. This works
whether the archive is private or public.


To answer your question, I made a mistake in the regex (it's been years
since messing with those little darlings). I actually blocked the
spoofed email by putting "t...@mydomain.org" in the "discard these
non-members" list.


The ONLY thing that will be accomplished by putting an address or regexp
in discard_these_nonmembers is that mail from matching non-member
addresses will be discarded instead of applying generic_nonmember_action.
If generic_nonmember_action is other than Accept, this should have no
effect on whether a particular message goes to the list without moderator
action.


Since I have also been getting emails from
"t...@otherdomain.com" I thought I would just discard everything with a
username the same as my (pretty unique) listname.  But I see now that I
got that regex wrong.

I don't understand how non-alphanumeric characters made a difference,
either, but they did.  Emails containing  such characters were not in
general a problem, but if they started with a '_' or a '-' or something
of the sort, mailman would simply let them through. When I put the
following regexes into the spam filter rule 1, the problem stopped:
from: _...@.*
from: -...@.*
and then, later, just in case, I added
from: \...@.*


Did you ever test with your own message with a From: beginning with '_' or
'-' to see if that was really letting messages through or if it was just a
coincidence?

Again,
What if anything is in the list's accept_these_nonmembers?

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