If the e-mail address that you provide at registration time is not accepting mail, then you can't complete the registration process. When I see situations like this, I have no means of contacting the user, so all I can do is delete the unfinished registration and hope that the user will try again, using a valid e-mail address.
To participate in the discussions on Catholic church music, sign in or register as a forum member, The forum is a project of the Church Music Association of America.