Banned email address message when registering

[jarvis24]

Sorry Kim, we wouldn't think you in particular to be a spammer, but much of the spam posted on our support site does (or did) come from yahoo email addresses. That's why we banned it and encouraged people to register with their edu, com or gmail accounts.

For others who haven't seen this, it's from the registration page:

Please enter a valid email address for yourself. HotMail and Yahoo addresses may be rejected to protect against spam. Try using a gmail, educational, or commerical email address instead.