Kolab without spam and virus protection

Mark Berndt kolab at mechtron.com.au
Tue Jul 12 13:49:31 CEST 2016


Hello Matthias and others,  this is incorrect, unfortunately I just copied it 
from my notes, not the config files. 

amavisd forwards the emails back into port 10027 which is the postfix 
listener.  smtp:[127.0.0.1]:10027

I've checked this with a new install of kolab.

sorry for any confusion,

Marko
 

On Tue, 12 Jul 2016 07:47:59 PM Mark Berndt wrote:
> Hello Matthias and others,
> 
>  I found in amavisd.conf section:
> $policy_bank{'ORIGINATING'} = {  # mail supposedly originating from our
> users forward_method => 'smtp:[127.0.0.1]:10026'
> 
> 
> which indicates amavis injects directly into wallace.  I was surprised to
> see it like that.
> 
> I am using kolab 16 on centos7.
> 
> with kind regards,
> 
> Marko
> 
> On Tue, 12 Jul 2016 10:13:40 AM Matthias Hütter wrote:
> > Hello,
> > 
> > i´m not sure if my way of disabling amavis is the correct one, but
> > anyway it works for some time now.
> > 
> > i disabled amavis in master.cf
> > 
> > # Filter email through Amavisd
> > #smtp-amavis unix - - n - 3 smtp
> > # -o smtp_data_done_timeout=1800
> > # -o disable_dns_lookups=yes
> > # -o smtp_send_xforward_command=yes
> > # -o max_use=20
> > # -o smtp_bind_address=127.0.0.1
> > 
> > i don´t think amavis injects mail directly to wallace. Amavis re-injects
> > mails into Postfix to port 10025 and Postfix injects them into Wallace
> > to 10026.
> > 
> > I think if amavis does not re-inject any mails postifx sends them to
> > wallace via unix socket.
> > 
> > # Filter email through Wallace
> > smtp-wallace unix - - n - 3 smtp
> > ...
> > 
> > ---
> > Mit freundlichen Grüßen/ Best Regards
> > 
> >  MATTHIAS
> > 
> > Am 12.07.2016 09:14, schrieb Mark Berndt:
> > > I don't think that is easy because after scanning, amavis injects the
> > > mail
> > > into wallace on port 10027.   Removing amavis would break the chain
> > > unless
> > > postfix master.cf was suitably adjusted which is outside my area of
> > > expertise.
> > > 
> > > There would be almost no performance overhead by calling the amavis
> 
> daemon
> 
> > > configured not to spam or virus check.
> > > 
> > > Marko
> > > 
> > > On Tue, 12 Jul 2016 09:02:26 AM guldendraak at gmx.net wrote: Great, thanks
> > > for the hint! Would it also be possible to entirely go without amavisd,
> > > i.e. not even starting the amavisd system service? I am guessing that
> > > would involve some tweaking of the postfix master.cf definitions. in the
> > > top of the /etc/amavisd/amavisd.conf file you can gloablly disable what
> > > amavis checks.  This should not effect the kolab installation, since
> > > amavis is still called, but not doing anything.
> > > 
> > > cheers
> > > Marko
> > > 
> > > On Mon, 11 Jul 2016 09:58:48 PM guldendraak at gmx.net wrote: Greetings
> > > list
> > > 
> > > is it possible to disable the anti spam and anti virus capabilities
> > > built
> > > into Kolab without breaking other things? From what I gathered through
> > > the
> > > documentation, simply disabling the content filter in postfix (which
> > > would
> > > - to my understanding - amount to removing the content_filter and the
> > > check_policy_service directives) would probably break some other things.
> > > Reason for asking is that using DNS black lists and grey listing works
> > > really well for me as spam protection.
> > > 
> > > Thanks!
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> > 
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