Hello,
Thanx for ur responses .

Some Clarifications ...
Sir Dice wrote:
You've made a typo, it's mail from: not mail from : (note the space between from and the collon).
Sir Dice, I've tried mail from: ... This too does not work with yahoo.. Thanx for the RFC's

Stugein wrote:
The "spoof" of the address you used is no different than if you had changed the "From:" line in any given mail client and sent a message to "[email protected]" as you normally would.
Stugein, by spoffing, one can not only change the from name field but also the from email address.( u can also use an email address which does not exist )

Tedob1 wrote: you have to have an account on a mail server unless its misconfigured and i seriously doubt you'd find this condition on hot mail
Tedob, I've tried this on hotmail today, I works pretty well.

Spyder32 wrote: The only way it has to do with relaying is that if the SMTP server your trying to get on with doesn't have authentication. Other than that, what your talking about is anonymous email sending. And like tedob said, it's doubtful that it would work especially in today's time. That goes back to open relaying, in the sense that you need a server that doesn't have any authentication on it, and most do
Spydy, I think u are right... Yahoo uses an authentication method so that anonymous mails cannot be sent... But in hotmail, we can still do so(*But such anonymous email headers will contain the ip of the sending system)...

Cheers.