When I invoke e-mail verification in the Opt-in module it fails when a recipient submits their e-mail address on the opt-in form. The following error message occurs.
"Failed to send validation email to the user, please contact site administrator".
We're using DNN 7.1.2 and Bulk Email version 6.07.44 on our site. Note: When we de-select email verification the email submit form works fine. Also, we request only their e-mail address on the form. Nothing else.