[Mailman-Users] Rejecting spam at the SMTP level?

Mark Sapiro mark at msapiro.net
Sat Aug 8 07:02:34 CEST 2015

On 08/05/2015 12:15 AM, Jayson Smith wrote:
> A few months ago I did some Googling and found a project called
> Mailman-Milter which claims to reject unwanted list mail i.e., nonmember
> postings at the SMTP level. I would love to use this, but there's
> virtually no documentation and I've never been able to get it working.
> Has anyone else had any better luck, or do you know of any other
> solutions? I'm using Sendmail, by the way.
> I would set all my lists to just discard nonmember traffic, but I want
> to allow for legitimate users who perhaps don't understand that they
> need to subscribe to lists before posting, legitimate members sending
> from wrong accounts, etc.

So, if you don't want to set the lists to discard non-member posts for
the reasons you explain, is it that much better to reject them at SMTP
time. Granted this avoids the issue of backscatter to bogus addresses,
but it isn't very helpful to the non-member senders of 'legitimate' posts.

A better solution is to use various sendmail tools to identify and
reject spam in general rather than just non-member list posts.

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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