If you have received such an email supposedly from Yahoo, well it is not from yahoo but con men.
Be smart and aware. Common sense will tell you this email is from scums of the earth out to con you.
Sent by firstname.lastname@example.org and reply to email@example.com?!?! Where is yahoo's name?
Ignore and delete such emails.
From: Yahoo! Mail Center© <firstname.lastname@example.org>
Date: Mon, 28 Nov 2011 00:15:00 -0600 (CST)
To: <Invalid address>
Subject: Account Verification (28/11/2011)