Sending links to pages within the portal is a common occurrence. If you go to a page within the portal from the portal, the framework, which includes the navigation, banner, and toolbar, are still there, and the page goes within the content pane.
However, if you take a portal link and send it to someone outside the portal, when they open it, they only see the content and not the rest of the framework.
There is a way to create a link to the portal page that will include the rest of the framework. To do this, take the link to the page in the portal, for example:
(which consists of the protocol, website name, type of page, and page ID)
and add the following into it right after the portal name and the slash:
The above page, if I were to go to it, would only open the content frame. Adding the extra notation after the website and the /, making it:
will open the page with the framework around it.
(Technically, it will also add PortalShell.aspx and convert the /'s after the = to %2f, but the link itself will still work)