[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 smtp.mailchannels.net [44.237.211.90] SMTP error from remote mail server after end of data: 550 5.7.1 [TCR] Generating too many errors with receivers 0104213