A lot of the newer mail and news programs provide a mechanisim which will allow you to 'attach' a file to your message. This can be a photo, a sound recording or even a complete family history book in your favourite word processor format. Even if you are sure everybody will be able to read it, the odds are that once it has passed through the internet it will be impossible to for anybody to understand without a lot of work. Please don't do it. Not everybody has access to the Internet via their workplace or college.
Some people have to pay for their access time.
Downloading large files which they are not going to be interested in is a waste of their time and money. Much better to post a short message saying that you have the information if they are interested and then send it to just those people who request it. The use of uuencoded files, zipped files or even HTML files are likely to mean that nobody will read your message. In some groups it will result in the message being rejected. Dealing with Junk mail It is an unfortunate fact of life that with the expansion of the Internet we are all likely to receive junk mail at some point.