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Solaris™ 8 Advanced System Administrator's Guide, Third Edition by Janice Winsor

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Chapter 2. Customizing sendmail Configuration Files

The sendmail program is a mail-transport agent and message router that uses a configuration file to provide aliasing and forwarding, automatic routing to network gateways, and flexible configuration. The Solaris environment supplies the standard configuration files that most sites can use.

With sendmail version 8.9.3, you no longer edit the sendmail.cf file directly. You should treat it as a binary that is not editable. Instead, you start with a file with a .mc (macro configuration) suffix and use the m4 macro processor to “compile” the .mc file into the final sendmail configuration file, which ...

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