I am trying to solve the following puzzle.

Let us say A send me a file. It can be a simple letter using the email program/webmail , a zip file or some freeware program. I want to transfer it to B immediately. However, I don't want B to know where it originates. How do I hide the identity and send to B?

You can easily find the details in the message header. I must hide those details.
If you send me an email, I could find more details in the header of the email.

I have an ordinary broadband connection. I have an ISP. Even A and B have ordinary Broadband connection like me. They too are private individuals. I mean they got home computers like me. The modems are different. I have an cable modem. A and B have ADSL modems.

I know it is possible to encrypt and send to B. That doesn't hide the identities. The encryption makes life difficult for someone who intercepts the message. Deciphering/hacking would be a tall order when you encrypt a message.
I would like to know the ways of hiding identities when sending a message.

I think there are some anonymouser services that can help you. Or just simply use a new mail address to send to B ... access that mail address using a proxy only ... stupidcensorship.com

Thanks duryodhan for the comments.
This should be possible without looking for another email address.
I hope someone gives me a better clue as to solve this problem.

I am waiting your comments on this.

Instead of forwarding the message, save it (or the attachment) as a file. Then send the the saved files to the other person as an attachment to your own message.

The only problem would be a "mail" message which, when saved, usually save the header as well. But you could easily do a "select all", copy the message (without headers), and then paste the copy into the new message you're creating for the other person.

Note: Be cautious doing his, since you may easily be accused of plagiarism or copyright violations for striping header information from documents so they appear to have originated from you.

I think maybe OP wants to forward the document automatically. Perhaps a script that checks for new files in the e-mail attachments folder and then forwards? I don't know how smart this needs to be.

Gins;
I think it might help for us to know more about why you are trying to do this. (i.e. the basic problem you are trying to solve)

Yes, i think he just wants to forward the attachment only, and make it seem as tho it came from him, hiding the identity of A. For this, i would say use fetchmail to download the mail, pass it over to procmail from which you call a shell script to strip the attachment, generate a new email with the attachment, and finally send it out using sendmail from the command line. Not sure if this would work tho.

Thanks everybody for the comments.
My question borders hacking as well as piracy.

Some friends download programs from crack sites. They are afraid of sending on the Internet. They burn them onto a CD and give it to other friends.
I was looking for ways of sending on the Internet.
One solution is to make a VPN. So if you have a VPN between your network and my network, this will work. So everything which travels under the VPN tunnel is secret.
I don't have a network.

It would be a tall order to intercept your VPN traffic and decipher.

It may be a tall order,

But when a detective is assigned to investigate using public money, no order is too tall because there is a steady flow from the money tap to get to the origin(s), as well as public support. If PTrenholme's suggestion is not sufficient, it's severely against the law and there is enough money to get to the bottom.

No No, I think a VPN is really a tall order. I mean something really really properly encrypted certainly can't be deciphered by any public servant. And they certainly won't put SuperComputers on you for a month to decipher it.

IMHO and my 2c

Wrong terminology, it's cracking and that's one reason why this thread is being closed.

This is illegal and LQ will play no role in such activities, even if it's helping you do the work in hiding ones identity but assisting in the transfer of copyright cracked materials makes you just as guilty as the person cracking or downloading the program that you are not entitled to without paying for.

Perhaps in the future if you need help in writing things that assist in illegal activity, you should keep quiet. But my recommendation, don't ask members here to assist in such activities, this will be my first and final warning or you can and will lose rights to this site.