Bad Address Syntax in Postfix

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How to auto restart services when linux reboots

Use chkconfig command.

To list services:
chkconfig --list [service]

To add service:
chkconfig --add {service}

To remove service:
chkconfig --del {service}

To change level of service:
chkconfig [--level {level}] {service} {on|off|reset|resetpriorities}

Sendmail start-up error

Problem:
451 4.0.0 /etc/mail/sendmail.cf: line 91: fileclass: cannot open '/etc/mail/local-host-names': World writable directory
451 4.0.0 /etc/mail/sendmail.cf: line 588: fileclass: cannot open '/etc/mail/trusted-users': World writable directory

This means that somewhere between the path of "/" to "/etc/mail/" is a World writable directory or a 777. In my case it was "/etc".

Change the permission to 755:
[root@linux]# chmod 0755 /etc

Start sendmail:
[root@linux]# service sendmail start