How to create an Autoresponder (or vacation message)

You can create an Autoresponder with the following .procmailrc file.

put your message in a textfile called .autoreply in your home directory.
replace the username@example.org instances with your address

Note that the mail still goes into your mailbox.

# shell is required for formail to work
SHELL=/bin/bash

# replace this with your address
# you also have to replace it in the ^TO line, below :(
AUTOREPLY_TO=username@example.org

:0hc
* ^TOusername@example.org
* !^FROM_DAEMON
* !^FROM_MAILER
* !^Precedence: list
* !^X-Loop: $AUTOREPLY_TO
| (formail -rt -A"Precedence: junk (autoreply)"\
               -A"X-Loop: $AUTOREPLY_TO" \
               -A"From: $AUTOREPLY_TO"; \
   cat $HOME/.autoreply ) | $SENDMAIL -t

Make sure to upload your .procmail file in ASCII mode if you use FTP