[[!meta title="Why do my mail scripts not generate bounces?"]]
The scripts server interprets procmail failures as temporary
failures, queueing the mail until the procmailrc is fixed. This is
useful if your procmailrc is unreadable or broken, but it can make
debugging difficult. If you want to explicitly bounce a message,
you can use a stanza similar to this in your procmailrc file:

    :0:
    * ^Delivered-To:.*USER_NAME\+TAG@.*
    {
            EXITCODE=67
            HOST
    }

The list of recognized exit codes can be found in the
[sysexits(3) manpage](http://www.gsp.com/cgi-bin/man.cgi?section=3&topic=sysexits).