We are aware of a problem which has resulted in emails sent from our accounts being bounced back to the sender.
We are in the process of investigating this problem and will add a further update once this problem has been resolved. We apologise for any inconvenience this problems is causing
The problem sending emails was the result of some of our IP addresses to be listed by Spamhaus. This issue has now been resolved, and the listings have been removed.
Spamhaus is a widely used email reputation and blocklist service that many mail providers use to help identify and filter spam.
Please be aware that some users may still experience occasional bounces from mail servers that are using Spamhaus data downloaded while the IPs were listed. These servers will stop rejecting messages once they refresh their Spamhaus data. As a result, some bounces may continue for a short period after the delisting, depending on each recipient mail server's update schedule.