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Sendmail, 3rd Edition by Bryan Costales

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Pitfalls

  • Old programs and scripts that are designed to use -bt mode to test addresses and the like tend to break with each release of sendmail. Fortunately, they are easy to fix if you know the language involved.

  • There is no way to currently define rules on the fly. Consequently, you need to modify a configuration file and run sendmail in rule-testing mode repeatedly until the new rules work.

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