Chapter 8. Test Rule Sets with -bt
The sendmail program offers a mode of operation
called rule-testing mode that allows you to observe the flow of
addresses through rule sets. The -bt command-line switch causes
sendmail to run in rule-testing mode.
This mode is interactive. You enter rule set numbers or names,
addresses, and other commands, and sendmail
processes them and prints the results. The -bt switch’s chief use is in testing changes in
the configuration file. It is also useful for learning how rules and
rule sets work.
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