The opendir() call fails, because the kernel returns a 'Permission
denied' (EACCES) error condition.
Check the permissions of
/
/var
/var/spool
/var/spool/postfix
/var/spool/postfix/defer
Except for the last directory, all above directories must have
read and execute permission for everyone.
drwxr-xr-x 23 root wheel 512 May 17 2016 /
drwxr-xr-x 25 root wheel 512 Mar 2 2016 /var
drwxr-xr-x 9 root wheel 512 May 1 2011 /var/spool
drwxr-xr-x 19 root wheel 512 Dec 25 2013 /var/spool/postfix
drwx------ 18 postfix wheel 512 Aug 18 2011 /var/spool/postfix/defer
Wietse
