Mail::Delivery::Queue class inserts a message to send back into the mail queue. Later FML::Process::QueueManager handles the real delivery process.
Article delivery processing is a little diffferent but based on queueing by Mail::Delivery::Queue. If someting error occurs in delivery, another fml process tries to deliver it later.
Code is like this to send back a message:
$curproc->reply_message( "you are not a ML member." );If no recipient specified, the recipient is the sender of the message (From: address).
To send a file, like this:
$curproc->reply_message( {
        type        => "text/plain; charset=iso-2022-jp",
        path        => "/etc/fml/main.cf",
        filename    => "main.cf",
        disposition => "main.cf example",
    });
$curproc->reply_message( {
        type        => "image/gif",
        path        => "/some/where/logo001.gif",
        filename    => "logo.gif",
        disposition => "attachment",
    });Copyright (C) 1993-2025 Ken'ichi Fukamachi mail:< fukachan at fml.org >