Modify delivery process ( libexec/distribute ) to send back /some/where/help file. For example, when a user can send anything to help@fml.org, fml sends back the help file to the sender. In this case, set the following at config.cf article_post_restrictions = permit_anyone and define the following hook after =cut line. $distribute_run_start_hook = q{ $curproc->reply_message( { type => "text/plain; charset=iso-2022-jp", path => "/some/where/help", filename => "help", disposition => "help example", }); $curproc->stop_this_process(); }; The last $curproc->stop_this_process(); method of &fml8; corresponds to the statement $DO_NOTHING = 1; of &fml4;. After this statement, the normal processing stops.