- milestone changed from 3.7 to Future Release
I started to break this down by removing is_email_address_allowed() all together, and using is_domain_in_list() directly in the validate signup function. I then realized that wildcards were actually useless here, because the logic that handles banned domains (and is now in is_domain_in_list()) already blocks subdomains when a higher level domain is blocked. Limited email domains, however, do not currently have this logic. So this is a code problem *and* a UX problem. There is just too much weird stuff going on here, need to move this out of 3.7.
http://irclogs.wordpress.org/chanlog.php?channel=wordpress-dev&day=2013-09-27&sort=asc#m697332
