If you ever receive an email that gives you, what appears to be, useful information to pass on to others always check it out first with one of the sites that lists hoax emails.
Hoax Slayer is one that I used recently after being sent an email titled "Mobile Phone Tips - things you never knew your mobile phone could do"
This message describes four things you can do on your mobile phone that could be useful in an emergency situation. However, the message contains a mixture of truthful and inaccurate information and therefore its overall value is questionable.
Infact its a really good site to check out the internet/email scams that are flying around.
Another email that has been circulating about cancer and toxins when freezing bottles is NOT endorced by John Hopkins as claimed in the email.
The site makes for interesting reading. Next time you receive one of these emails check it out first then email the person that sent it to you to inform them if the information they have sent on is a hoax.