[Mailman-Users] Blocking messages from kijiji

[francis picabia]

On Thu, Oct 27, 2011 at 9:37 AM, francis picabia <fpicabia at gmail.com> wrote:
> Hello,
>
> We run a mailing list for staff which should not
> receive email from outside of the list membership.
>
> The only non-member address allowed to post is
> another mailing list.
>
> Today we received a post from post at kijiji.ca
> and it made it through to the list.
>
> I see this in the post log file:
>
> Oct 26 18:21:41 2011 (2999) post to fyi from post at kijiji.ca,
> size=5293, message-id=<1190302152.2079281319664066415.JavaMail.root at kj-classy012>,
> success
>
> We've tested this with a second small membership and restricted
> mailing list for our IT staff, and again a post from kijiji gets through.
>
> If we email from a gmail account or something, it is blocked as expected.
>
> In kijiji interface, they allow you to set up the sender, and this is
> likely passing the test for the sender, but it is only
> the sender in the envelope, which isn't reported in mailman
> (nor Postfix in what I saw).
>
> We've been running the same mailman 2.1.9 from Redhat for
> a few years and there has never been a problem like this before.
>
> I think we would prefer if both the sender From: and the envelope
> sender had to match, or had to both be allowed to post.
>
> Adding the post at kijiji.ca address to the rejected senders did not block them,
> which isn't surprising as it is looking at the other subscribed sender.
>
> Anyone else have experiences with that or suggested approaches?
>

I looked at older postings in this mailing list and it appears this is
a solution:

Quoting Mark Sapiro:

> If this is your Mailman installation, you could try putting
>
> SENDER_HEADERS = (None,)
>
> in mm_cfg.py. This would say that the post is considered to be from a
> member only if the envelope sender is a member."

I'll try this.