The incoming and outgoing mail server is configured correctly, but I can not send emails to providers
Error
Mail delivery failed via the server SMTP 'myserverrsmtp'.
SMTPRecipientsRefused: {'user@mydomain.com': (550, '5.1.0 <bounce+12-res.users-25@mydomain.com>: Sender address rejected: User unknown in virtual mailbox table')}
Have you configured an MX record? Did you configure the e-mail server to allow remote connections?
thanks, yes configure the e-mail server to allow remote connections and configured an MX record. no found!