[Ripe-list-unmoderated] Mail delivery failed: returning message to sender

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: ripe-list@ripe.net host mail-mx-1.ripe.net [193.0.19.17] SMTP error from remote mail server after pipelined MAIL FROM:<ripe-list@ripe.net> SIZE=6013: 550-rejected: envelope sender is in our domain, but server ip is not - 550 ripe-list@ripe.net