On Fri, 8 Jun 2007, Michael Schwartzkopff wrote:
> Nothing in the log files, which I think is very strange. I do logging, 
> but realy nothing in any logfile. I even changed /etc/syslog.conf.

It is very strange, since you explicitly asked for logging in the 
configuration file, and this is the only incident of no logging that's 
been reported.

I have a very similar configuration and I get plenty of logging:

Jun  8 09:37:01 medusa dkim-filter[24575]: l589axqL008969 SSL 
error:04077068:rsa routines:RSA_verify:bad signature
Jun  8 09:37:01 medusa dkim-filter[24575]: l589axqL008969: bad signature data
Jun  8 10:14:14 medusa dkim-filter[24575]: l58AEBUQ010808: bad signature data
Jun  8 19:59:34 medusa dkim-filter[24575]: l58JxRw7002516: no signature data

...etc.

> I know that dkim-filter does not block mails, but it should add a header
> abount the missing signature or wrog signature.

It will add an Authentication-Results: header and a log entry about failed 
signature verification, but an unsigned message doesn't necessarily 
generate any information in the log or add such a header (otherwise 
dkim-filter would fill your log file and your mail spool with largely 
useless data).

> Any idead how to tell dkim-filter to log at least something?

It should be logging something when signatures fail to verify, as well as 
startup and any error or other unusual conditions.  It's otherwise pretty 
silent.

Unfortunately I'm left to guess without more details.  If you're familiar 
with the C debugging environment, you could try tracing through mlfi_eom() 
and see what's going on and perhaps determine why it's skipping the log 
functions (or notice that it's not, and then try to figure out why calls 
to syslog() don't seem to be working).

-MSK

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