We are now seeing successful email delivery across providers, and no further related issues have been observed. We will continue to monitor the situation, but at this stage, normal service has resumed.
Posted Jun 09, 2025 - 17:36 BST
Update
We are continuing to monitor for any further issues.
Posted Jun 09, 2025 - 13:31 BST
Monitoring
A fix has been implemented and we are monitoring the results.
Posted Jun 09, 2025 - 13:30 BST
Investigating
The IP addresses 185.151.28.65 & 185.151.28.66 were recently listed on Spamhaus, which may have caused email delivery issues for some users. We can confirm that the listing has now been removed; however, you may continue to see errors such as “Service unavailable, Client host 185.151.28.65 blocked using Spamhaus” while the updated status propagates across external mail providers. We appreciate your understanding and expect normal service to resume as these blocklists are refreshed. For more information, please see: https://check.spamhaus.org/results?query=185.151.28.65 & https://check.spamhaus.org/results?query=185.151.28.66