I'm paid user, but unable to receive and send email.
Your account is blocked due to suspected spam/abuse.You can contact our helpdesk at https://help.mailbox.org to clarify this suspicion if necessary.
I have contact 3 days ago, but there is no any response.
I have the same problem. I have contacted support, created a ticket but received no reply sofar.
Replies have been locked on this page!