Hello, I wish to enable the ISO timestamp format, and to have a granularity of six digits. I have enabled the following in my global options : frac_digits (6); ts_format(iso); The timestamp format is enabled as expected, but the fractional digits always appear as straight zeros. For example : 2010-07-12T16:49:27.000000+00:00 s_sys@srv-01 postfix/qmgr[2851]: 2EF1B1F9034E: removed Is there a way to enable the desired millisecond timestamps ? Details : $ uname -s -r -v -p -o Linux 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:14 EDT 2010 x86_64 GNU/Linux $ cat /etc/redhat-release CentOS release 5.5 (Final) $ rpm -qa | grep syslog-ng syslog-ng-2.1.4-1.el5 Thank you, and have an excellent day. -- Daniel Maher <dma PLUS syslogng AT witbe DOT net>