2009/5/14 Noah <1giglimit at gmail.com>
If it is an SMTP Server that is accepting outgoing mail without
authentication, and you are sending from a domain that it accepts,
Isn't it possible to just use an e-mail client, say Outlook Express, and
change the Reply Address?
Quite right. That's how I used to spoof emails in the days of way back
(1995) when University mail relays were wonderfully permissive. Never
underestimate the amount of trust that end users put into the From: field;
I've seen people believe the most unlikely of stories because of who an
email purported to be from.