Headers can be forged, if that is what you want to know. And tracing can get messy sometimes in attempting to track down the originator. Toplez Razer wrote:
Dear Folks, We receive an e-mail that we want to reply back, but the sender's SMTP is NOT registered in DNS. Let's say the sender is who@xyz.com.
Let's assume xyz.com is being resolve with its ISP DNS 150.150.150.1. But there is no MX for xyz.com in this DNS.
Our e-mail is MS Exchange 5.5. Can we trace the sender's SMTP IP address? Is there better way than to peel off the original header packet to see the sender IP?
Thanks, Audie Onibala
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