The mailing list for listmasters using Sympa

[Miles Fidelman <address@concealed>]

Thanks again, Soji!

A little more follow-up....

On 3/30/16 7:33 AM, IKEDA Soji wrote:
> Miles,
>
> On Tue, 29 Mar 2016 18:11:38 -0400
> Miles Fidelman <address@concealed> wrote:
>
> > Thanks, Soji!
> >
> > I wonder if you could elaborate just a bit - re. questions, inline,
> > below....
> >
> > > From: IKEDA Soji <address@concealed>
> > > To: "address@concealed" <address@concealed>
> > > Subject: Re: [sympa-users] discarding mail from non-subscribers?
> > > Date: Wed, 30 Mar 2016 00:21:51 +0900
> > > Hi Miles,
> > >
> > > 2016/03/29 22:01、Miles Fidelman <address@concealed> のメッ
> > > セージ:
> > >
> > > > Hi Folks,
> > > >
> > > > I'm trying to clean up way too much backscatter being generated by our
> > > > Sympa installation. Which leads me to wonder a few things:
> > > >
> > > > 1. Is there a standard scenario that discards mail from
> > > non-list-members,
> > > > rather than sending an error response?
> > > "send.confidential" scenario (provided by Sympa 6.2.x) does such,
> > > however, it
> > > is so restrictive and may not always be useful for your purpose.
> >
> > And, we're still running 6.1.20
> I misled.  "send.confidential" standard scenario is available on 6.1.17 and 
> later.
>
> > > You can create custom "send" scenario to return the result "reject,quiet".
> > Is there any easy way to do this globally?  Or am I stuck doing it
> > list-by-list?
> Unfortunately, no easy way to do it globally, I think.
>
> A bit easier way is hiding all "send.*" scenarios except "send.confidential" and then 
> modifying config of all existing lists.  After this change, all lists will refer only 
> "send.confidential" scenario.

I'm not sure send.confidential does it - it looks to be the same script 
as private, moderated for non-subscribers:
title.gettext Private, moderated for non subscribers

is_subscriber([listname],[sender]) smtp,dkim,md5,smime    -> do_it
is_editor([listname],[sender])     smtp,dkim,md5,smime    -> do_it
true()                             smtp,dkim,md5,smime    -> editorkey

I guess I really do have to edit it to
....
true()                             smtp,dkim,md5,smime    -> reject,quiet
> > > > 3. Does sympa have any good mechanisms for filtering/discarding
> > > messages
> > > > sent to -owner and sympa@<domain>?
> > > I was wondering more if any of the spam processing mechanisms apply 
> > > to *-owner and such (i.e., discard anything labeled higher than xxx, 
> > > by spamassassin). 
> In my experience, I have used amavisd-new as Postfix filtering service.  It 
> can integrate SpamAssassin, anti-virus (ClamAV etc.) and DNSBL, and can 
> filter much malicious things before messages arrive at Sympa.
>
> Sympa itself may cooperate with such softwares, however, I suppose filtering 
> unnecessary things in advance will help performance.

Sympa's directions for anti-spam say that it can make use of markings by 
spamassassin, etc. - but it's not clear that Sympa pays attention to 
these for the -owner address, etc.

Unfortunately, the dev-docs and such are not easily accessible to folks 
not at an affiliated institution.

Thanks,

Miles

--
In theory, there is no difference between theory and practice.
In practice, there is.  .... Yogi Berra