
Your mail to Internet via this gate has failed for some addressing reason.

It should look like :

 From: <your name>   <your address>
 To: uucp            2:200/427
 Subj: <subject for the mail>
 ----------------------------------
 To: user@address        <- first line/column of message body.
                         <- must be an empty line.
 your mail text.

------------------------------------------------------------------------------