Side notes: Randy is a friend and member of the Bryan Bass Club and is currently the tournament director for PAA. If you are interested in either the Bryan Bass Club or the PAA, you can click on them to visit their website. Links are also provided at my website: Mikel.com

Hoaxes are chain letters telling interesting (sometimes funny, often scaring) stories of computer viruses, something for free (even money), new laws and much more. They all have one thing in common: they are not true.
Don’t Forward Hoaxes

This is why you should not forward such a story unless you have investigated it yourself.

You will irritate those that do not spot the hoax and
they will probably pass it on, causing more irritation.
Those that identify the hoax will likely send you a message notifying you that you passed on an urban legend.

If you know a message is a hoax but have a specific reason to forward it nevertheless (for scientific purposes, for example), you might want to include your reason with the message.

Forwarding emails as attachments is a clean and useful way to share them with others. Unfortunately, doing this will usually also share all the email addresses of the original message with the recipient of the forwarded message: the sender (which is desirable), but also all the To: and Cc: recipients (which should be avoided in general).
Forward Emails as Attachments Without Revealing Addresses

To forward an email as an attachment without revealing all the addresses in it:

Save the message you want to forward as a .eml or .msg file.
Open the saved message in a text editor like Notepad.
Delete all the email addresses you do not want to reveal.
Usually, you can simply remove the To: and Cc: lines completely.
In your email client, forward the original message as an attachment.
Before sending the forward, however, delete the automatically generated attachment.
Attach your edited .eml or .msg file instead.
Continue composing and delivering the forward as usual.

Some email messages are worth forwarding.
If many people share that opinion, many will forward a particular message, and they will forward it to many other people. Most email programs insert the headers including To: and often Cc: by default when you forward a message.

What Happens if You Do Not Remove Addresses

This has the single advantage that everybody knows who already got a particular message. No need to forward the same mail to the same person twice.

But including all header information with all other To: and Cc: recipients has overwhelming disadvantages.

The message looks horrible, and often the actual content is buried and hard to find between all the email address.
You share the email addresses with third parties without the consent of the addresses’ owners. I wouldn’t want my address given to I don’t know who just because somebody forwarded me something that she also happened to forward to 150 other people.
Remove All Email Addresses When You Forward a Message

That’s why you should always remove all email addresses
(except for the original sender if you deem it appropriate) before you send a forward. If you forward the message inline, just highlight them and hit Del. If you forward the message as an attachment, you might have to take some extra steps.