Error 404 on a "change subscription settings" in email

edit

When we get an email from askbot because of a tag, the bottom of the email contains a link to change your subscription settings.

If you click on the link, but are not logged in, you get a 404 error web page (or a trace if debug is on).

It would be better to have a redirect to the login screen, and once logged in, another redirect to the subscription settings page.