[What great attribution lines]
[Ed's signature snipped, because that's how we do it on Usenet, GG
notwithstanding]
My Main purpose:
I am writing a batch program to save some files from server to user
desktop directly. I shall send a email to user and they just click on
the URL link, the batch will run and save the files on user's desktop.
Ah, information!
You might try zipping the files and storing them on your Web server,
then include the URL to the file(s) in the e-mail. When (and if) your
recipient clicks on the (presumably clickable, linked) URL, their e-mail
client might ask them what to do with the file (save or open). You can
tell them in the e-mail to save it (on their desktop, you say), and
maybe they will, and maybe it'll work when they try it.
GL