The issue has been resolved. Thank you for your patience and understanding.
May 22, 10:45 BST
Our technicians are still working to rectify the issue with Microsoft. Please continue to retry sending your mail as not all emails are rejected. We will post an update as soon as new information becomes available.
May 21, 15:15 BST
Email sent to hotmail, outlook.com and live.com addresses may be intermittently rejected due to Microsoft blocking some of our IP addresses.We are aware of the issue and have contacted Microsoft to request de-listing.
As not all emails are rejected, we kindly ask you to resend your email again.
Please accept our apologises for any inconvenience caused.
May 20, 12:36 BST