The URL is probably breaking up in your email... you need to ake sure the highlighted (blue) string of letters you go to is the whole URL, not just the first half....
Failing all else....go to the start of the URL then left click and hold and highlight the whole thing the cut and copy it into a free IE and use it that way?......I generally just visit the site to see the answers anyway and ignore the emails unless I have loads of questions on the go.