Checks an email address against the followings RFCs:
http://tools.ietf.org/html/rfc5321
http://tools.ietf.org/html/rfc5322
http://tools.ietf.org/html/rfc4291
http://tools.ietf.org/html/rfc1123#section-2.1
http://tools.ietf.org/html/rfc3696
The WordPress Email Registration Blacklist plugin helps you block unwanted email addresses or domains during user registration. Easily create custom blacklists to prevent spam sign-ups, unauthorized access, or specific email providers from registering on your site. It's a simple yet powerful tool to
... [More] enhance your site's security and maintain control over user registrations. [Less]
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