tanoli

If you have got it sending, please help me out too. My Problem is. My exchange server receives emails externally (from Yahoo/Gmail) but it does not send emails. I don't even get the delivery failure message. It sends email but never received on the Yahoo/Gmail account. Can you please guide me where I am making a mistake? Regards,

Where abouts do I find the bit to change the authentication? And also, how do I change the fqdn of this incoming reply from the local.domain to the real external one?