First Make
an yahoo Account,and Connect it to
Facebook..and then, Set This yahoo email in
facebook to primary email...
Then Go to
yahoo....mail..Click on Setting>Vacation
Response>Then .
Type the comment in the
box...and choose the date From when to
when,,.then
Save the setting then go to the
facebook group on which you want auto 1st
comment..and select on group notifucation.,then
select All Post..and..Its all Done..