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

12th May 2021

Email: Germany German SMTP IP range on MS block list

We've received some reports that outlook.com and other Microsoft mail services are blocking smtp.de.opalstack.com.

We're investigating now and will follow up when we have more info.

  • Microsoft is now accepting mail from smtp.de.opalstack.com.

  • We've identified and corrected the cause of the block, and have passed our findings along to Microsoft with a request to delist the German SMTP address.

    We'll update this post when Microsoft have confirmed that the server is no longer on the block list.

    • 11th May 2021

    No incidents reported

    10th May 2021

    Web: San Francisco Opal8 not responding

    Opal8 (shared server in San Francisco) is currently not responding. We're looking into the issue and will follow up here when we have more info.

  • Repairs are complete and Opal8 is back online.

  • Opal8 is now down for repair. The expected downtime is 30 minutes.

  • The server has remained stable since it came back online after the initial incident.

    We're now waiting on the data center team to bring down the server for repair.

  • Opal8 has a faulty memory module. We're now scheduling a repair with the data center team.

  • Opal8 is back online after an unexpected reboot. We're still investigating.

    • 9th May 2021

    No incidents reported

    8th May 2021

    No incidents reported

    7th May 2021

    No incidents reported

    6th May 2021

    No incidents reported