Emails sent from the site to Hotmail accounts are getting incorrectly rejected as spam.  I'm trying to resolve this but it may take a while.  If you use a Hotmail address you will not be getting subscription emails, or worse still if you try and register with a Hotmail email address your emails will not get through.  If you want to register on the site, switch to a non Hotmail email address for now.

Microsoft have still not ub-blocked this site from sending email to users of their mail accounts:

This should now be resolved.  I've set up a test account at outlook.com and I can receive emails from the site.