Книга: Fedora™ Unleashed, 2008 edition

Building the sendmail.cf File

Building the sendmail.cf File

Books are available to explore the depths of Sendmail configuration, but the Sendmail Installation and Operation Guide (check on Google for this) is the canonical reference. Configuration guidance can also be found through a Google search; many people use Sendmail in many different configurations. Fortunately, Fedora has provided a default Sendmail configuration that works out of the box for a home user as long as your networking is correctly configured and you do not require an ISP-like Sendmail configuration.

After you have made all your changes to sendmail.mc, you have to rebuild the sendmail.cf file. First, back up your old file:

# cp /etc/mail/sendmail.cf /etc/mail/sendmail.cf.old

You must run sendmail.mc through the m4 macro processor to generate a useable configuration file. A command, such as the following, is used to do this:

# m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf

This command loads the cf.m4 macro file from /usr/share/sendmail-cf/m4/cf.m4 and then uses it to process the sendmail.mc file. The output, normally sent to STDOUT, is then redirected to the file sendmail.cf, and your new configuration file is ready. You have to restart Sendmail before the changes take effect.

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