We have a VPS server having DNS & VPS CPanel installed. On this VPS, we have 3 important website where the users visit & registers themself with their Email ID. Emails from all our three websites are not reaching users having Boxbe. We are getting below message. Hello Subject, Your message about "XXXXXXXXX" was waitlisted. Please add yourself to my Guest List so your messages will be delivered to my Inbox. Use the link below. Click here to deliver your message Thank you, Address TO EMAIL Powered by Boxbe -- "End Email Overload" Please advice or help us. We don't SPAM & do mass mailing
They (the users of Boxbe) need to accept you as a valid sender/domain before your e-mails will reach them directly, for now they need to login and view the "waiting list".