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

20th February 2024

No incidents reported

19th February 2024

Delays in mail forwarding to Google

Google had rate-limited 2 of our forwarding MX servers over the weekend resulting in forwarding delays for some users who forward mail to Gmail.

We've corrected the cause of the rate limit and expect all pending mail to be delivered over the next several hours.

  • All of the pending forwarded mail has been delivered.

    • 18th February 2024

    No incidents reported

    17th February 2024

    No incidents reported

    16th February 2024

    No incidents reported

    15th February 2024

    Email: Germany EU mail system blocked by Hotmail

    Part of our EU mail infrastructure was blocked by Hotmail. The affected servers were:

    • smtp2.de.opalstack.com (outgoing mail)
    • mx1.de.opalstack.com (incoming mail and forwarding)

    We've already dealt with the issue and Microsoft have confirmed that the servers have been unblocked, but it may take a few more hours to take full effect.

    We'll update this post when we've confirmed that mail is no longer being blocked.

  • All blocks have been lifted.

  • mx2.de.opalstack.com was added to the block list as well, we have submitted the delisting request and are awaiting action from Microsoft.

    • 14th February 2024

    No incidents reported