If mailboxes should automatically be sent a message when they are updated, you may specify it here. It can be the default, which can be edited using the Updated Mailbox Email page of Virtualmin, or you can provide another text file anywhere on the system. Variable substitution using the following variables: ${MAILBOX}, ${USER}, ${DOM}, ${FTP}, and ${HOME}. You may also use the special logic block operators $IF-MAIL...$ENDIF-MAIL and $IF-WEB...$ELSE-WEB...{$ENDIF-WEB} to allow your message to create an appropriate message based on the features the user has access to.