162 lines
3.8 KiB
Plaintext
162 lines
3.8 KiB
Plaintext
#
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# read this with 'perldoc README.plugins' ...
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#
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=head1 qpsmtpd plugin system; developer documentation
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See the examples in plugins/ and ask questions on the qpsmtpd
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mailinglist; subscribe by sending mail to qpsmtpd-subscribe@perl.org.
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=head1 General return codes
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Each plugin must return an allowed constant for the hook and (usually)
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optionally a "message".
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Generally all plugins for a hook are processed until one returns
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something other than "DECLINED".
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Plugins are run in the order they are listed in the "plugins"
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configuration.
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=over 4
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=item OK
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Action allowed
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=item DENY
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Action denied
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=item DENYSOFT
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Action denied; return a temporary rejection code (say 450 instead of 550).
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=item DENYHARD
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Action denied; return a permanent rejection code and disconnect the client.
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Use this for "rude" clients.
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=item DECLINED
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Plugin declined work; proceed as usual. This return code is _always_
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_allowed_ unless noted otherwise.
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=item DONE
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Finishing processing of the request. Usually used when the plugin
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sent the response to the client.
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=back
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See more detailed description for each hook below.
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=head1 Hooks
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=head2 mail
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Called right after the envelope sender address is passed. The plugin
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gets passed a Mail::Address object. Default is to allow the
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recipient.
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Allowed return codes
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OK - sender allowed
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DENY - Return a hard failure code
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DENYSOFT - Return a soft failure code
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DENYHARD - Return a hard failure code and disconnect
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DONE - skip further processing
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=head2 rcpt
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Hook for the "rcpt" command. Defaults to deny the mail with a soft
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error code.
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Allowed return codes
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OK - recipient allowed
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DENY - Return a hard failure code
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DENYSOFT - Return a soft failure code
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DENYHARD - Return a hard failure code and disconnect
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DONE - skip further processing
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=head2 data_post
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Hook after receiving all data; just before the message is queued.
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DENY - Return a hard failure code
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DENYSOFT - Return a soft failure code
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DENYHARD - Return a hard failure code and disconnect
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DONE - skip further processing (message will not be queued)
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All other codes and the message will be queued normally
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=head2 queue
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Called on completion of the DATA command.
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DONE - skip further processing (plugin gave response code)
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OK - Return success message
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DENY - Return hard failure code
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DENYSOFT - Return soft failure code
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DENYHARD - Return a hard failure code and disconnect
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Any other code will return a soft failure code.
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=head2 connect
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Allowed return codes:
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OK - Stop processing plugins, give the default response
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DECLINED - Process the next plugin
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DONE - Stop processing plugins and don't give the default response
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=head2 quit
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Called on the "quit" command.
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Allowed return codes:
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DONE
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Works like the "connect" hook.
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=head2 helo
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Called on "helo" from the client.
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DENY - Return a 550 code
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DENYSOFT - Return a 450 code
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DENYHARD - Return a hard failure code and disconnect
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DONE - Qpsmtpd won't do anything; the plugin sent the message
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DECLINED - Qpsmtpd will send the standard HELO message
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=head2 unrecognized_command
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Called when we get a command that isn't recognized.
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DENY - Return 521 and disconnect the client
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DONE - Qpsmtpd won't do anything; the plugin responded
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Anything else - Return '500 Unrecognized command'
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=head2 disconnect
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Called just before we shutdown a connection.
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The return code is ignored. If a plugin returns anything but DECLINED
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the following plugins will not be run (like with all other hooks).
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=head2 deny
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Called when another hook returns DENY or DENYSOFT. First parameter is
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the previous hook return code; the second parameter the message the
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hook returned.
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Returning DONE or OK will stop the next deny hook from being run.
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DECLINED will make qpsmtpd run the remaining configured deny hooks.
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