[Dev] Mailman backscatter spam

Luke Shumaker lukeshu at sbcglobal.net
Sat Sep 12 23:12:27 GMT 2015

On Sat, 12 Sep 2015 04:32:30 -0600,
Michał Masłowski wrote:
> I have disabled respond_to_post_requests on the lists.
> Spammers use possibly fake sender addresses so Mailman sends them
> notification that their mail is held for approval.  This is not ok and
> should get our server blacklisted.
> I believe mail approval is fast enough and senders get feedback why
> their useful mails are rejected (e.g. when they are much too big), so
> that option isn't needed.

I'm fine with that; we don't have any weird filters.  arch-projects
rejects emails if the Subject: line doesn't have specific [keywords]
in it... and there's no notification that it was rejected.  If no
notification for strict filtering is good enough for Arch, it ought to
be good enough for us.

Happy hacking,
~ Luke Shumaker

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