<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body text="#000000" bgcolor="#ffffff"> Hi, I am using sendmail 8.13.8-8 with Gmail SMTP. sendmail works fine with OSSEC or test from command line, but it has problem with Nagios: sendmail[9026]: NOQUEUE: SYSERR(nagios): can not chdir(/var/spool/clientmqueue/): Permission denied Add the smmsp user to nagios group, I get the another error: sendmail[26435]: NOQUEUE: SYSERR(nagios): can not write to queue directory /var/spool/clientmqueue/ (RunAsGid=0, required=51): Permission denied The permissions of related files: <pre class="incoded">-rwxr-sr-x 1 root root 775064 Jun 29 23:46 /usr/sbin/sendmail -rw-r--r-- 1 root root 59061 Jun 30 11:23 sendmail.cf -rw-r--r-- 1 root root 40336 Jun 30 12:18 submit.cf drwxrwx--- 2 smmsp smmsp 114688 Jul 22 22:00 /var/spool/clientmqueue/ drwx------ 2 root mail 4096 Jul 22 22:24 /var/spool/mqueue/ </pre> Nagios only send mail if I changed the permission of /var/spool/clientmqueue to 777, but it is a dirty solution and I got the warning: sendmail[30462]: dangerous permissions=40777 on queue directory /var/spool/clientmqueue/ PS: Nagios on the another server works fine with 770 permission of /var/spool/clientmqueue. Can anyone help me? </body> </html>