Have your received similar message quoted below? It is a scam! Do not click the link. It looks like Yahoo.com authorised link but when clicked, it will redirect to another link entirely. Be warned!
You received an eCard
FROM: Yahoo! Greetings
TO: Card ID-39452073507
Sunday, 23 October 2011, 14:27
To view your eCard, choose from the options below.
Click on the following link.
http://www.yahoo.com/view.pd?i=2557862098&m=3187&rr=y&source=yahooe999
OR
Copy and paste the above link into your web browser`s "address" window.
Thanks for using Greeting Cards on Yahoo.com
http://www.yahoo.com