HWUMC

* If the forum does not accept your email address when you change your email address or create an account, it's very likely that your email domain name (ie @iamsexy.com, @cheapairfaire.com, @blabla.com,...) is part of the "banned email addresses list" that I've implemented on the forum.

* Using your heriot-watt account, you will be fine. Using a hotmail/yahoo account should work too.

* The last solution is to contact a forum admin. We can sort you out.