Your message did not reach some or all of the intended recipients. Subject: Email Solution Sent: 12/12/2012 11:08 AM The following recipient(s) cannot be reached: '[email protected]' on 12/12/2012 11:08 AM 550 5.1.1 <[email protected]> recipient rejected
Answer:
550 5.1.1 means that the recipient email server believes that the email address does not exist at the destination domain, and therefore has no way to deliver it.
Unless you simply made a typo in the email address, this is not something that you can fix, and must be addressed at the other end.