We are currently having issues when sending emails from our domain - fencing.cymru.  This only applies when we send to external Microsoft mailboxes (so Hotmail, Live, Outlook etc).  These are being interpreted as spam and are being returned unsent.

We have raised a fault report with our email provider who have raised the issue with Microsoft.  We don't know when it will be resolved, but until then we will re-send any failed emails from a personal mailbox.