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:

  joshika.sewsanker@mrc.ac.za
    host za-smtp-inbound-1.mimecast.co.za [41.74.193.210]
    SMTP error from remote mail server after RCPT TO:<joshika.sewsanker@mrc.ac.za>:
    550 Invalid Recipient - https://community.mimecast.com/docs/DOC-1369#550 [0UJMfvivP4eDV2_1bbsJfA.za19]
  joshjaha@msn.com
    host msn-com.olc.protection.outlook.com [104.47.55.161]
    SMTP error from remote mail server after RCPT TO:<joshjaha@msn.com>:
    550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302).