Nothing happen

1) It takes about 15 seconds after I press Register button. Then I see message ‘Confirmation link was sent…’. But there is no mail in box.
2) During register process I see in WP->Users this user appear. But after I receive success message this user is removed.

Checked with Chrome, IE. Receive success message and no confirm.link.
In Firefox don’t get success message. Just redirected to My Account page again.

https://ww.wp.xz.cn/plugins/woocommerce-email-verification/