All systems are operational
Maintenance
US IMAP email server downtime

On 22 July 2026 at 10:00 am US/Central time (UTC -5) one of our US IMAP email servers will be shut down for infrastructure maintenance. The server will be offline during the maintenance and the expected downtime is 6 hours.

Affected customers will be notified individually via email.

No incoming mail will be lost while the server is offline. Mail that arrives during the maintenance will be deferred and delivered once the mail server is back online.

We realize that the timing of this relocation is not ideal. If you have business-critical mailboxes and would like them to be available during the maintenance then please email support@opalstack.com or reply to this message to make arrangements to have your mailboxes migrated to a different IMAP server prior to the scheduled maintenance date.

If you have any questions or concerns regarding this maintenance then please email the Opalstack support team for assistance.

Past Incidents

19th October 2022

Email: USA IPv6 email rejections

A misconfiguration in our IPv6 DNS settings was causing some mail providers (including Gmail) to reject some mail sent or forwarded from Opalstack's mail system over the past 3-4 days. The problem has been corrected.

18th October 2022

No incidents reported

17th October 2022

No incidents reported

16th October 2022

No incidents reported

15th October 2022

No incidents reported

14th October 2022

Email: USA Delays in US mail forwarding to @yahoo.com addresses

An abusive network was sending a very high volume of messages to a @yahoo.com forwarding address hosted on Opalstack's US mail system. The high volume of mail has caused Yahoo to temporarily defer messages resulting in delayed delivery.

We've blocked the abusive network and expect that Yahoo will begin to accept the deferred messages over the next few hours as their systems register the overall message volume decrease.

  • Yahoo are no longer deferring mail forwarded from our US MX servers.

  • Yahoo have begun to accept some mail forwarded from our US MX servers. We'll continue to monitor.

    • 13th October 2022

    Web: Washington D.C. opal10 not responding

    Opal10 (Washington DC shared hosting) is currently not responding, we're investigating at this time.

  • The cause of the unexpected reboot was a power cable fault. The cable has been been replaced and the server is operating normally at this time.

  • Opal10 is back online after an unexpected reboot, we'll continue to investigate.