thanks for mailing and solving my problem especially
cory wright who give me idea.
but i need some more flexible. i want that anybody can access mail from
anywhere either from outlook or some client.
Then i need a general rule from anywhere mail will be sent.
as now i write in tcp.smtp
for example anyperson who is any other state and configure outlook ,in that
case he can't mail sent bcz it give error of invalid rcpthost.
so i need a global ,from anywhere i mail sent.no need to add address or ip
of in tcp.smtp.