Help on mounting a program on webpage

Hello,
I'm very new to Java and have trying different home projects in order to better learn Java. Well before I started on one project I noticed an email program in Core Java VOL. 2, ran that program and found it interesting. However, something doesn't work right. My computer is behind my father's LAN and out to the internet via Cable Modem. It was suggested that being on a non-routable address might be the problem, I could send mail to my comcast.net account but no text would show, no sender, no subject, no body, nothing, the communication seemed to be okay (HELO and so forth) but i could NOT get through to AOL to test it out on my friends AOL email address (ACCESS DENIED). So my less than novice mind thought that what if I mount a program or something on my comcast webpage and tried to communicate to that from my computer and have the program send the data from the webpage. Would this idea work, would it also work if i wanted to throw together a little home-made chat program? If it would work, and I designed a program that i think would work, how do i upload it to a webpage so that it will run or at least be active in such a way that when my program calls it from here, the program on my webpage will receive the data and do its work?
Thank you,
Chris

First off, your questions are not "stupid" - stupid questions are like "do my homework for me." You're just trying to learn.
Now to your original question(s).
1) You can't "mount" a program on a web-page, unless you're writing an Applet.
2) Applets can be quite tricky in that they operate in a security "sandbox" - doing network-level communications using them is a bit problematic.
3) I'm not familiar with the mail program you referenced and you're not really providing sufficient/correct information in order to assist. However, I'm guessing that you're trying to "send" the e-mail directly to the receiving e-mail server - that won't work. You have to send e-mail via the outbound SMTP server that the on-line account is associated with. The receiver's mail server is trying to reverse-lookup the originator of the message and since you're not running a valid SMTP server for the domain you're sending from, it rejects the message.
4) Crawl before you try to run - I think you'll need a bit more experience in constructing network-aware programs before you try to tackle the intracacies of firewalls, NATs, etc. Try experimenting with a "local" e-mail server (James from the Apache project might fill the bill).
5) As for the chat program, once again, get it working "locally" (same physical machine), then try on two machines on the same local network (if available), then you can try to make it work via the Internet. It ain't that easy, but it's also not rocket science.

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you need to add exclamation marks to signify how urgent it is
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SOLUTION
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