While trying hard long and long hours to write a perl script that can extract attachments from pieces of e-mail, I realized that there were no clear info on the web on how to do, and that if I successed, I would publish that script.
Finally I succeded. That is actually very easy and that is probably why nothing was ever published about it. But, when you are a beginner in Perl (I learned it in 1 week), you normally need a little bit more help. Also, I was not alone in that case and there were a numerous questions on various forum, but without satisfying answers.