FYI:
webmaster@netmaniak.com
SMTP error from remote mail server after RCPT TO:<webmaster@netmaniak.com>:
host smtp-scan01.mx.reflected.net
550 <webmaster@netmaniak.com>: Recipient address rejected:
sorry, no mailbox here by that name (#5.1.1 - chkusr)
Came back to me from a submit yesterday. Tried sending a test email this morn. Came back too!