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When configuring postfix, Got the following error on sudo postmap /etc/postfix/sasl_passwd

postmap: fatal: bad string length 0 < 1: setgid_group = 
6

just comment out in main.cf the setgid_group = line

#setgid_group =

and rerun

sudo postmap /etc/postfix
  • 2
    That didn't work here, I had to put in a group name, fortunately postdrop was configured in /etc/group so setgid_group = postdrop worked after a postmap – afbach Jun 19 '17 at 21:43

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