Email from servlet

[Hengtai Yu]

Dear All, I try to send email from inside servlet and I have a few examples. But when I compile them, or I miss some packages, ex. java.servlet.*, or class, ex FormServlet. After I download JavaMail package and find JavaMailServlet.java, it can be compiled, but it does not work because I can not login to mail system(I have hostname, user and passwd) and  "MailUserData getMUD(HttpSession ses)" always return null. Where can I find some examples working? or what's wrong in my procedure? thanks hengtai