We’re receiving many request of invitation every day. But when we send invitation to users in turn, many e-mails are returning due to mis-typing. Since there is still a time lag between user’s request and our sending of invitation, user may think that we are not ready to send them invitations. But actually, our invitation cannot be reached to users even after we become ready. The number of return mail is not just 10, or 100. It’s very regret that users cannot enjoy our service due to mis-typing. So, please double check your e-mail address when you enter it.