Bullshit. There are many many hoax messages circulating purporting to warn about non-existant viruses. This is one of them.
It has all the hallmarks of a hoax. It attributes to email what it cannot do (it cannot execute a program). It urges everybody to spread the word. Computer security gurus aver that this panicky tale-telling is itself a virus. And it claims that some presumably reputable organization is the source of the warning.
Check out the panicky message first in comp.risks, ask in one of the security newsgroups, before passing on the hoax yourself.
-- Homines id quod volunt credunt.