E mail puzzle

[dollhouse]

I received an e mail which is a line of numbers 1- 20 with the caption 'Find the error - it's impossiblel'. When you send it to five people the answer should come up, but of course it doesn't. Has anyone solved this

[factor-fiction]

No it won't come up -I'm sure it's a chain email designed to clog up email systems and waste people's time. How would it know when you'd sent 5 copies?

[factor-fiction]

But the error may be that the word IMPOSSIBLE is spelt incorrectly!