I agree that it's the best approach to re-generate the page since you have indicated you can't send a link. Unless each page puts some very heavy load on the server, regenerating it shouldn't be a problem.

Some other issues to think about are how big the pages might be. Sending really large emails from your web server might end up creating more challenges than re-requesting a page.

Also, if the recipients may not have access to the intranet content, you'll have to work around the fact that images and other included content won't be seen. Maybe you only need the text of the page, so it won't matter. But if things like images are important to the look of the page, you'll need to send the page and the images. That could make for a fairly large email.