Drupal’s hook system is making me almost as happy as Emacs’ hook system does. =)
There’s a hook_mail_alter function that allows you to modify any message your system sends. Example:
function mymodule_mail_alter($mailkey, &$to, &$subject, &$body, &$from, &$headers) {
$body .= "\n\n" . t('This is a system-generated email, please do not reply to this message');
}
You gotta love developers who plan for extensibility and put all sorts of hooks into the code…
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I'm 