Your mail message to the following address(es) could not be delivered. This
is a permanent error. Please verify the addresses and try again. If you are
still having difficulty sending mail to these addresses, please contact
Customer Support at 480-624-2500.
[Return Code 550] sid: lh8E1l00A2eL8Ck01 :: Unknown user
This is an automatically generated Delivery Status Notification.
Delivery to the following recipients was aborted after 10 second(s):
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:
We have tried to deliver your message, but it was rejected by the recipient domain.The error that the other server returned was: 550 550 Requested action not taken: