Here error message from Virtual Office log file

NPSMailService 10/27/05 3:02:42 PM::Error sending message to:
FIRST.LAST@dea.co.san-XXXXX.ca.us error:
com.sun.mail.smtp.SMTPSendFailedException: 501 Address Syntax Error in
<%mail%>

anyone know where to modify this variable to accept our long and unusual
email address?

Thanks in Advance
Larry G