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Chapter 8. Test Rule Sets with -bt > Batch Rule-Set Testing
8.8. Batch Rule-Set Testing
The output that is produced by sendmail can become huge, especially when many addresses need testing. To simplify the process (and to help bulletproof your configuration file), consider using a shell script such as the following:
#!/bin/sh
/usr/sbin/sendmail -bt < $1 |\
egrep "canonify.*input:|canonify.*returns|^>"
