When using the autorespond option it would be great if an ATTACHMENT could be included with the message. Is there any possibility?

I submmit a form to an email address (sinera@sinera.org) in which I have an autoresponder with an attachement (in the server where I have my domain:sinera.org). On submitting to sinera@sinera.org nothing happens; the autorespoder does nothing. Instead, if I send a mail to sinera@sinera.org instead of the FORM SUBMITTED it sends the message and the [...]