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Re: best practices for fighting spam with Debian?

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Daniel Pocock <daniel@pocock.pro> wrote:

> A key point to consider for any filtering is the user experience when a
> legitimate message is not delivered.

> This includes the following:

> - does the sender know their mail was not delivered and do they get a
> reasonable explanation?  I've heard there are spam filters who give a
> "user doesn't exist" error which is somewhat disrespectful to genuine
> senders.

I can understand the reason for this: Don't give the spammers any
indication if an address is valid. But I have yet to see any solid
evidence that it makes a difference if one responds with a "500 Your
was classified as SPAM." or "500 User does not exist".

Far more "damage" is done by clicking on any (so called) unsubscribe
links in SPAM mails.


> If the messages end up in a junk folder the sender has no idea.
> Personally I think it is better to graylist or reject messages with a
> basic explanation like "Your message could not be delivered because of
> local policy"

Exactly.

> - does the recipient have to wade through a junk mail folder looking
> for things that went there by mistake?  In this case, I feel the spam
> problem hasn't really been solved at all, the user still has to do the
> work sifting through spam to find the ham and it is still a painful
> overhead for them.

Some people want to operate this way. 

> In some countries and certain industries a lot of companies have
> simply started using cloud solutions from some of the large vendors.
> They tend to get all the messages from companies in their industry on
> the same platform, but I noticed that one of them was incorrectly
> putting mail that had come from one of my Debian mail servers into
> their junk folder.  Their IT manager spent a lot of time chasing the
> vendor to find out why this was happening and they never got any valid
> answer.  It was frustrating for them and for people sending the mail.
> The vendor would just say that they have to keep their policies
> secret.

Also exactly the reason why we $here decided to do the heavy lifting
ourselves instead of buying a ready-made appliance.

S°

-- 
Sigmentation fault. Core dumped.

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Thread

best practices for fighting spam with Debian? Daniel Pocock <daniel@pocock.pro> - 2016-12-15 09:20 +0100
  Re: best practices for fighting spam with Debian? Sven Hartge <sven@svenhartge.de> - 2016-12-15 10:50 +0100
    Re: best practices for fighting spam with Debian? Brian <ad44@cityscape.co.uk> - 2016-12-15 21:40 +0100
      Re: best practices for fighting spam with Debian? Sven Hartge <sven@svenhartge.de> - 2016-12-15 21:50 +0100
        Re: best practices for fighting spam with Debian? Daniel Pocock <daniel@pocock.pro> - 2016-12-16 08:00 +0100
          Re: best practices for fighting spam with Debian? <tomas@tuxteam.de> - 2016-12-16 10:00 +0100
            Re: best practices for fighting spam with Debian? Sven Hartge <sven@svenhartge.de> - 2016-12-16 10:20 +0100
              Re: best practices for fighting spam with Debian? <tomas@tuxteam.de> - 2016-12-16 11:00 +0100
                Re: best practices for fighting spam with Debian? Lisi Reisz <lisi.reisz@gmail.com> - 2016-12-16 22:00 +0100
                Re: best practices for fighting spam with Debian? Lisi Reisz <lisi.reisz@gmail.com> - 2016-12-16 22:30 +0100
                Re: best practices for fighting spam with Debian? <tomas@tuxteam.de> - 2016-12-16 22:50 +0100
                Re: best practices for fighting spam with Debian? Brian <ad44@cityscape.co.uk> - 2016-12-16 23:50 +0100
                Re: best practices for fighting spam with Debian? Lisi Reisz <lisi.reisz@gmail.com> - 2016-12-17 00:50 +0100
                Re: best practices for fighting spam with Debian? Joe <joe@jretrading.com> - 2016-12-16 22:30 +0100
                Re: best practices for fighting spam with Debian? Richard Owlett <rowlett@cloud85.net> - 2016-12-17 13:10 +0100
          Re: best practices for fighting spam with Debian? Sven Hartge <sven@svenhartge.de> - 2016-12-16 10:10 +0100
    Re: best practices for fighting spam with Debian? Vincent Lefevre <vincent@vinc17.net> - 2016-12-16 13:10 +0100
      Re: best practices for fighting spam with Debian? Sven Hartge <sven@svenhartge.de> - 2016-12-16 13:20 +0100
      Re: best practices for fighting spam with Debian? Joe <joe@jretrading.com> - 2016-12-16 19:00 +0100
        Re: best practices for fighting spam with Debian? Vincent Lefevre <vincent@vinc17.net> - 2016-12-19 13:10 +0100
          Re: best practices for fighting spam with Debian? Joe <joe@jretrading.com> - 2016-12-19 18:40 +0100
            Re: best practices for fighting spam with Debian? Vincent Lefevre <vincent@vinc17.net> - 2016-12-20 01:30 +0100
  Re: best practices for fighting spam with Debian? Glenn English <ghe2001@gmail.com> - 2016-12-15 20:30 +0100
    Re: best practices for fighting spam with Debian? Sven Hartge <sven@svenhartge.de> - 2016-12-15 22:00 +0100
  Re: best practices for fighting spam with Debian? terryc <terryc@woa.com.au> - 2016-12-16 03:40 +0100

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