The filter commands which are described in subsequent setions are listed below, with the section in which they are described in brackets:
`add' increment a user variable ("The add command") `deliver' deliver to an email address ("The deliver command") `finish' end processing ("Other commands") `if' test condition(s) ("Obeying commands conditionally") `logfile' define log file ("Logging commands") `logwrite' write to log file ("Logging commands") `mail' send a reply message ("Mail commands") `pipe' pipe to a command ("The pipe command") `save' save to a file ("The save command") `testprint' print while testing ("Other commands") `vacation' tailored form of `mail' ("Mail commands")
In addition, when Exim's filtering facilities are being used as a system filter, the `fail', `freeze', and `headers' commands are available. However, since they are usable only by the system administrator and not by ordinary users, they are described in the main Exim specification rather than in this document.
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