All systems are operational
Maintenance
Scheduled network maintenance for opal3 and opal8

On 20 August 2026 between 11:00am and 4:00pm PDT (UTC-7) our data center team will be upgrading the racks that host the following servers:

  • opal3.opalstack.com
  • opal8.opalstack.com

During the 5-hour maintenance window, network connectivity to the affected servers will be interrupted for up to 1 hour during which websites and other services hosted on the servers will be unavailable.

Email and DNS services will not be affected.

The hosting control panel will remain online, but will be unable to apply changes to your services until connectivity to the server is restored.

Affected customers who would like have their services relocated to a different server prior to 20 August 2026 should contact the Opalstack support team to make the necessary arrangements.

Scheduled US IMAP email server downtime

On 26 August 2026 at between 11:00 am and 4:00 pm US/Pacific time our network team will be performing infrastructure maintenance. During this 5-hour window, network connectivity to one of our US IMAP/POP3 email servers will be interrupted for up to 1 hour.

As a result, some customer mailboxes will be unavailable for up to 1 hour during the network interruption. Customers who will be impacted by the interruption have been emailed directly.

No incoming mail will be lost during the interruption. Mail that arrives during the interruption 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 interruption will not be stored as sent mail in IMAP folders on the server.

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 contact the Opalstack support team.

Past Incidents

3rd January 2022

Email: Germany German SMTP blocked by Microsoft

On January 3 2022 at 20:47 UTC Microsoft began blocking mail sent from smtp.de.opalstack.com to domains that use the Microsoft 365 email system.

Microsoft's own IP reputation and junk mail reporting systems indicate that there are no problems with smtp.de.opalstack.com so we've reached out to them for answers.

We'll update this post as soon as more information is available.

In the interim as a possible workaround customers may create a new mailbox on our US mail server and use that temporarily for their outgoing email authentication.

  • It's been over a week and we've seen no blocks of the new server IP by MIcrosoft, so we consider this to be resolved.

  • We informed Microsoft of our findings and the corrective action we've taken but we've still received no further communication from them.

    To work around this we've moved smtp.de.opalstack.com to a new IP address. Customers do not need to change any settings - the DNS change should propagate automatically within the hour.

    After the DNS change has propagated, customers should be able to send mail to email addresses that are hosted by Microsoft.

    We'll leave this incident open and will continue to monitor.

  • We've still not heard from Microsoft but we believe we've identified the activity that triggered the block and are taking action to mitigate it at this time.

    We'll notify Microsoft of the actions we're taking and continue to hold on for a response.

  • We're still awaiting a response from Microsoft and have reached out to them as a reminder.

    • 2nd January 2022

    No incidents reported

    1st January 2022

    No incidents reported

    31st December 2021

    No incidents reported

    30th December 2021

    No incidents reported

    29th December 2021

    No incidents reported

    28th December 2021

    Web: Dallas Opal4 not responding

    opal4.opalstack.com (Dallas shared hosting) is not responding. We're looking into it.

  • Opal4 is back online. We've reached out to our network provider for details regarding the outage.