Account creation broken ("Email address is invalid")

I’ve spent the better part of the last hour trying to create a new (froob) account to build a mule character on, but no matter which email address I try, I am always rejected with “this email address is not valid”.
I don’t know what filter mechanism Funcom uses there, but I’ve tried four different domains that I own, none of them works. I’ve tried longer and shorter addresses, makes no difference.