host smtp-in.orange.fr [193.252.22.65]
   SMTP error from remote mail server after end of data:
   550 5.2.0 Mail rejete. Mail rejected. ofr_506 [506]

Hello, Since yesterday lots of our e mails keep coming back Now almost every e mail ? We have a few accounts , and they all have the same problem How can we solve this please? This is what we get This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed: host smtp-in.orange.fr [193.252.22.65] SMTP error from remote mail server after end of data: 550 5.2.0 Mail rejete. Mail rejected. ofr_506 [506]