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I just added domain keys to my sendmail configuration and everything appears to be working. However, upon reviewing the maillog I get a ton of these when an email gets sent or received:

Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue
Oct  4 09:42:44 servername sendmail[22036]: q94GgiGB022036: milter=dkim-filter, action=header, continue

Any clues as to what might be causing this? It's not a huge issue but I'd rather not have that many lines every time one email gets sent out.

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1 Answer 1

up vote 1 down vote accepted
+50

dkim-filter has a -l option. If you omit that argument chances are that these log lines will disappear.

Another possible way is installing syslog-ng and using filtering directives you can remove lines before they gets logged. (I like the latter as you can remove other programs meaningless output too.)

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Thanks for the reply...I'll look into both options. Is this normal functionality? Do you know why it's logging so many duplicate messages like this? –  Jeff Dec 6 '12 at 9:05
    
I guess that after each intercepted header you get a log line as the daemon is in verbose mode. I might be wrong as I am not familiar with sendmail, but I use dkim-filter with postfix. –  cstamas Dec 6 '12 at 22:17

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