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: donations@abetterlifedogrescue.co.uk host abetterlifedogrescue.co.uk [172.245.115.197] SMTP error from remote mail server after end of data: 550 "The mail server detected your message as spam and has prevented delivery." donavan@houseofprint.co.za host za-smtp-inbound-1.mimecast.co.za [41.74.197.210] SMTP error from remote mail server after end of data: 554 Email rejected due to security policies - https://community.mimecast.com/docs/DOC-1369#554 [BxtLgwQ0M7WQ8t-z5QOMvA.za132] DONE_MADDEN@HOTMAIL.COM host hotmail-com.olc.protection.outlook.com [104.47.17.97] SMTP error from remote mail server after RCPT TO:: 550 5.5.0 Requested action not taken: mailbox unavailable (S2017062302).