Setting Up Internet Email Within Outlook

[Natalia]

At home, I have 3 different internet email accounts set up
within Outlook, and they work fine.

At work, I have tried to add my internet email accounts,
with the same settings that work at home, and it doesn't
seem to work. I set up the new email, it seems successful,
but then the email box never appears in my folder list.

When I hit Send/Receive, I get an error message saying the
server couldn't be found.

Any ideas? Would this be related to corporate security?

Thanks,
Natalia