Registration is saying that email address is NOT valid for customer but it is! by Tips and Tricks HQ Support Portal › Forums › WP eStore Forum › WP eStore Troubleshooting › Registration is saying that email address is NOT valid for customer but it is! This topic has 13 replies, 4 voices, and was last updated 9 years, 3 months ago by modellicreations. You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In