Hello there, I'm using Wordpress SMTP Mail plugin and I configured my settings to send some e-mail from my server. I can send email to myself (as a admin) but I can't send emails to visitors who filled up form. I want to send email to my visitors when they filled up appointment form.    MY ERROR LOG:   ------------ ERROR #22 ------------
TYPE: MAIL
ERRORS: {"wp_mail_failed":["You must provide at least one recipient email address."]}
ERRORS_DATA: {"wp_mail_failed":{"to":[""],"subject":"Reservation 10","message":"<p>onaylandi<\/p>","headers":[],"attachments":[],"phpmailer_exception_code":2}}
---------- ERROR #22 END ----------