aaron wolfe blxpsargmailcom tue mar 4 2008 826 pm c thala wrote one 4 incoming mail servers get stuck whatever reason queue mail couple hours noticed sort fault use nagios didnt set anything check mail basic check port 25 open apart postqueue p postfix built mechanisms admin queue use third party product whip script youre using nagios anyway add check queue size least youll know something wrong hopefully users aaron fri 08 aug 2008 042307 0500 monitoring queue mechanisms