You don't need to have an empty subject line, it's ignored by listserv...

d
At 12:24 PM 3/16/2000 , Woody Halsey wrote:
>Dear List,
>
>I am about to leave for a long trip and need to stop receiving all your
>great messages for a while.
>
>I have printed out the instructions John Rodgers kindly offered recently
>for suspending mail delivery. Unfortunately my old version of CServe
>(2.6.1) apparently will not allow me to send a message with something in
>the "subject" line.
>
>Any suggestions?
>
>Thanks,
>
>Woody

David Beierl - Providence, RI
  http://pws.prserv.net/synergy/Vanagon/
'84 Westy "Dutiful Passage"
'85 GL "Poor Relation"