It's been quite some time since I've worked in the networking, etc. field and I'd love some info' from the more experienced please...
Here's the situation I'm playing around with:
We have an Exchange server, but one of our guys sends/recieves his mail through POP, because he is on a different domain with irrelevant (to this discussion) settings.
I can, using Telnet, connect to his account and send email, but only to accounts on our domains.
EG: I can send mail through his account to myself, or anyone else in our organization.
Now, my questions are:
1. Why can I not send mail externally?
2. How exactly is this working?
I know it seems a bit daft, but whilst I can get this to work, I'm not exactly clued up on how it's all working...
Essentially what I'm trying to prove is that I am able to send email from his account, through the Internet (remember, he's using POP, so he's external - right?), and back to us.