All systems are operational
Maintenance
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

22nd February 2024

No incidents reported

21st February 2024

No incidents reported

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.