Hi, how do you receive your email?
- in a POP3 email client?
- by web mail in a browser?
What happens if you right click the link, then click 'Copy link location' or similar (the text depends on the program you're using) and then paste that into your browser address bar? Presumably that opens the appropriate page.
Configuring hypertext links to open in your chosen browser:

Hi, to configure hypertext so clicking on such links works, you will probably find you need to use the old control panel. That's what I found, as choosing a default browser when I originally did that did not include hypertext links. I don't know if that's been fixed in the last year or so- I've not seen a report of someone having trouble with it for about that time.
However, your issue seems strange in that you say it opens only the home page.