Okay, I think I have become confused.
The warning email says " Snopes confirmed as real" but I think the virus may be called "postcard". It's kinda hard to tell but when I googled "Snopes" it sent me to a 'Daily Snopes page' on the Urban legend website
It appears that Snopes is a term for "Urban Legends"
In which case if the virus is called "Postcard" that would appear to be genuine.
My brain hurts
