PO External send (mail /fax) : Report statuses

Dear all,

We use Message transmission medium "External send" to send our purchase orders by mail or fax to vendor. Is there a possibility to report error statuses if the sending is not successful?

Example: There is no email-address on the vendor master data. The message can't be send to the vendor. Now, the creator of the message should receive a mail to inform him of the failure.

How can we do that?

Thanks and best regards,

Thomas