Bad Address Syntax in Postfix

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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

Linux: Sendmail

Linux must have direct internet access.

Sendmail is located in /etc/mail
The editable configuration file is sendmail.mc.
The default settings are ok if you don't like to edit the file.
After editing, type the following command:
[root@localhost ~]# make -C /etc/mail

If sendmail-cf is not installed this will generate an error. So install sendmail-cf.
[root@localhost ~]# yum install sendmail-cf

After installation of sendmail-cf, make again. When OK, restart sendmail.
[root@localhost ~]# service sendmail restart

* Using Fedora Core 3