All systems are operational
Maintenance
Scheduled DE IMAP/POP3 email server downtime

On 24 September 2026 at between 07:00 am and 10:00 am UTC our network team will be relocating one of our mailbox storage servers to a new location within the data center.

The server will be offline during the relocation. As a result, some customer mailboxes will be unavailable for up to 3 hours during the relocation. Affected customers will be notified directly via email.

Affected customers will not be able to check their email for affected mailboxes during the relocation.

No incoming mail will be lost during the relocation. Mail that arrives during the relocation will be deferred and delivered once connectivity to the mail server is restored.

Email forwarding and SMTP services will not be affected, however messages sent via SMTP during the relocation will not be stored as sent mail in IMAP folders on the server.

Customer websites will not be affected by the relocation.

We realize that the timing of this relocation may not be ideal. Customer who would like to have their mailboxes migrated to a different server in advance of the server relocation should contact the Opalstack support team to make the necessary arrangements.

We'll update our status page at http://status.opalstack.com/ at the beginning of the maintenance window. To be informed of system status updates automatically please subscribe at https://status.opalstack.com/subscribe.

If you have any questions or concerns regarding this maintenance then please email our support team and someone from our team will get back to you as soon as possible.

Past Incidents

23rd January 2021

Email: USA US SMTP on Cloudmark blacklist

At this time Opalstack's US SMTP is on the Cloudmark blacklist. We're working to have the server delisted and expect that to be done within the next 24-48 hours.

  • Our US SMTP is no longer on the Cloudmark blacklist.

    • 22nd January 2021

    No incidents reported

    21st January 2021

    Web: Frankfurt EU VPS network connectivity problems

    Connectivity to some EU VPS may be degraded due to active ongoing maintenance by our upstream provider. We'll update this post as soon as the maintenance is complete.

  • The network has been stable since our last update so we're considering this to be resolved.

  • EU VPS network connectivity is now stable. We'll continue to monitor.

  • EU VPS customers may see further connectivity issues while our upstream provider is performing emergency maintenance.

  • The maintenance is complete and connectivity to EU VPS remains stable.

  • Connectivity to EU VPS is stable at this time. The maintenance is still in progress so we'll continue to monitor.

    • 20th January 2021

    No incidents reported

    19th January 2021

    Email: USA US IMAP service performance degraded

    The IMAP service on our US mail system is currently running very slowly. We're working to correct that at this time.

    This is also causing timeouts and errors for users accessing Opalstack webmail, including users of our German mail system.

  • The US IMAP server is back online and is operating normally. We'll be upgrading the server in February to avoid future problems.

  • We've rebooted the US IMAP server and are monitoring.

    • 18th January 2021

    No incidents reported

    17th January 2021

    Web: San Francisco Opal3 not responding

    opal3.opalstack.com is currently not responding. We'll follow up here when more info is available.

  • The problem was caused by extremely high RAM usage from a process run by a hosting customer. We've notified the customer of the problem and have taken steps to prevent it from happening again.

  • Opal3 is stable after the reboot. We'll update this post when we've determined the cause of the outage.

  • Opal3 is back online after a reboot. The cause of the outage is still under investigation.

  • We're rebooting Opal3 at this time.