Format of Da Vinci eMail "NetWhereIs" parameter block:
Offset	Size	Description	)
 00h	WORD	segment of node address buffer
 02h	WORD	offset of node address buffer
 04h	WORD	segment of uppercase username
 06h	WORD	offset of uppercase username
 08h	WORD	segment of "DVSEMAIL"
 0Ah	WORD	offset of "DVSEMAIL"