<page_title> Control message </page_title> <section_title> Obsolete message types </section_title> <table> <cell> Sendsys <col_header> Name </col_header> </cell> <cell> RFC 850, RFC 1036, RFC 5537 <col_header> Definition </col_header> </cell> </table>
The sendsys was declared obsolete by RFC 5537.