proxymail.facebook.com

Jeroen,
In the app permission dialog that comes up, the user has a small link called "change" next to their email address. While most users never see or use that option, it allows them to use the proxy email from Facebook. Our understanding of that email address is that it simply makes any of your emails go through FB servers before going to the user. It's used to prevent spam and, I believe, Facebook checks to make sure the reply-to address is of the same domain as your app (another spam check). Obviously, it's also protects the user by obscuring their real email address.

There's no way to avoid it, but if it's the first time you've seen it, that should tell you how commonly it's used. Of course, if you have their real email address in the username field, it's up to you if you just want to copy that over to their email field as well...

Hope that explains,
Alex

Jeroen,
Did you find the option after I explained it? Pretty sure it's still available to users, but Facebook rolls out updates to their dialog boxes slowly, so it's possible a newer (or even an older) one doesn't have that option.

For the HTML, yeah, that's a little silly. I understand their point in 'protecting' the users email that opt for that option though.

As for an extended permission to require email, nope, it's never been there. Originally, you couldn't get the user's email at all (5'ish years ago). Then, they added a permission for email, and since day one, the proxymail option has been available. I could always be wrong, but pretty sure it's always been the user's choice.

Hope that helps explain,
Alex

Jeroen,
We're in the process of redesigning the site.. More social features is definitely one of the goals. I may test adding the Like buttons to each thread before then, after your suggestion. Would be interesting to see how many Like's are clicked from forum posts.

As for the best way to help, please consider leaving a rating and review on the Joomla Extension Directory, if you haven't already. I actually thought you had, but couldn't find one from a quick check:
extensions.joomla.org/extensions/social-...ook-integration/7215

Thanks, and best of luck,
Alex