What do you see in your syslog reports from spamc?
Is it reporting any errors?

Please note the 'max-size' parameter for spamc:

  -s max_size, --max-size=max_size
      Set the maximum message size which will be sent to spamd -- any bigger 
      this threshold and the message will be returned unprocessed (default: 500 
      If spamc gets handed a message bigger than this, it won't be passed to 
      The maximum message size is 256 MB.

So any message larger than that parameter (default 500KB) will be silently
bypassed as far as spamd processing is concerned.

Note, do not make that a large number in an attempt to process -everything- unless you have a beefy (lots of RAM & CPU) machine for your spamd processing.

On Fri, 16 Sep 2016, Maik Linnemann wrote:

SA is integrated into postix via master.cf like:

# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
# ==========================================================================
smtp      inet  n       -       -       -       -       smtpd
  -o content_filter=spamassassin

spamassassin unix -       n       n       -       -       pipe
         user=nobody argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f 
${sender} ${recipient}

i dont have milter or amavis in place. av scanning is done in the backend, 
where i would say the tagging should already be done (and mostly its the 

Von: li...@rhsoft.net [li...@rhsoft.net]
Gesendet: Freitag, 16. September 2016 15:52
An: users@spamassassin.apache.org
Betreff: Re: X-Spam Tagging - Spam Status YESNO Flags - Sometimes not 

Am 16.09.2016 um 14:49 schrieb Maik Linnemann:
So far so good. The concept works like it should with only one
exception: Some mails are not tagged by spamassassin and i dont have a
clue why. Viscerally i would say its about 20% of all mails that arent
tagged by spamassassin

Dave Funk                                  University of Iowa
<dbfunk (at) engineering.uiowa.edu>        College of Engineering
319/335-5751   FAX: 319/384-0549           1256 Seamans Center
Sys_admin/Postmaster/cell_admin            Iowa City, IA 52242-1527
#include <std_disclaimer.h>
Better is not better, 'standard' is better. B{

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