System Status
Replies to Support team not being processed
Update - Support tickets and replies from Mailprotector will temporarily originate from a zendesk.com email address rather than our standard mailprotector.com domain. This is an intentional change we made to restore email reply functionality to our ticketing system.

Emails arriving from zendesk.com on behalf of Mailprotector Support are legitimate. If your email filtering flags these messages as possible impersonation, they are safe to release and trust.

We will update this notice when we return to our standard domain.
Jun 04, 2026 - 10:55 EDT
Identified - We are currently experiencing an issue with our Microsoft 365 tenant that is preventing us from receiving email replies to our support address. We are working to resolve this.

If you need to reach us, please log into the support portal (support.mailprotector.com) and submit or update your request there. Portal submissions are working normally and will reach our team.

We will update this notice once email replies are restored.
Jun 04, 2026 - 09:45 EDT

About This Site

Our goal is 100% uptime.

We recognize the importance of being able to trust the companies which help run your business. We want to be one of the most transparent vendors you work with. Transparency keeps us honest, and drives us to our goal of 100% uptime.

We monitor the status of all Mailprotector services. If there are any interruptions in service, a note will be posted here.

If you are experiencing problems with your Mailprotector service and do not see a notice posted, please contact our service team.

Uptime over the past 90 days. View historical uptime.
Shield Operational
90 days ago
100.0 % uptime
Today
Bracket Encrypted Email Operational
90 days ago
100.0 % uptime
Today
Radar Operational
90 days ago
100.0 % uptime
Today
CloudFilter and SafeSend Email Security Operational
90 days ago
100.0 % uptime
Today
Management Console Operational
90 days ago
100.0 % uptime
Today
XtraMail Continuity Operational
90 days ago
100.0 % uptime
Today
SecureStore Archiving Operational
90 days ago
100.0 % uptime
Today
CloudMail Hosted Email Operational
90 days ago
100.0 % uptime
Today
Service Announcements Degraded Performance
90 days ago
100.0 % uptime
Today
Issue Notice Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Major outage
Partial outage
No downtime recorded on this day.
No data exists for this day.
had a major outage.
had a partial outage.

No incidents or maintenance related to this downtime.

Jun 4, 2026
Microsoft Exchange Online experiencing intermittent mail flow issues
Resolved - This incident has been resolved.
Jun 4, 09:41 EDT
Update - We have begun reprocessing and redelivering emails that bounced during the affected time period. Here is what to expect:

Most emails should be delivered, but not all of them. Some bounces during the incident may have been legitimate, and those messages will not be recoverable through reprocessing.

Duplicates are possible. If a sender resent their email after the incident and the original message is also redelivered through our reprocessing, recipients may receive both. This is expected behavior and not a cause for concern.

Reprocessing takes time. We expect this to be completed by midnight ET tonight, though it may finish sooner.
Jun 3, 17:12 EDT
Monitoring - Earlier today, Microsoft identified some of Shield's services as suspicious or compromised. This caused emails to bounce or be delayed. As of approximately 2:30 PM ET, the status began to lift, and we observed a return to expected mail flow.

A support request has been opened with Microsoft to help us determine how and why this incident happened. We have not received a response yet. We are not closing this issue as resolved. Our intention is to get to the root of the incident.

Our first priority was to find a way to resume normal mail flow, and it appears we have done so. We are continuing to monitor the situation, including the Microsoft notice regarding mail flow issues in Exchange Online, which appear to have been resolved.
Jun 3, 15:26 EDT
Update - Microsoft Defender is restricting connectors due to false-positive reports. Please go to Microsoft Defender > Restricted Entities and unblock the listed connectors. (https://security.microsoft.com/restrictedentities)

You will need to monitor and check on this restriction for the time being. We have observed that Microsoft restricts the connector after a short time, and the unblock request must be made again.

We are continuing to monitor and investigate possible mitigation options.
Jun 3, 12:33 EDT
Identified - Microsoft is experiencing intermittent issues with mail flow. Please see their notice for reference.
https://admin.cloud.microsoft/#/servicehealth/:/alerts/EX1331830

Mailprotector is monitoring the situation. However, mail flow with CloudFilter and Shield appears to be normal. Please check logs to identify bounces or delays from Microsoft hosts to confirm potential effects from their systems.
Jun 3, 11:46 EDT
Jun 3, 2026
Jun 2, 2026

No incidents reported.

Jun 1, 2026

No incidents reported.

May 31, 2026

No incidents reported.

May 30, 2026

No incidents reported.

May 29, 2026
Scheduled Maintenance for Shield
Completed - The scheduled maintenance has been completed.
May 29, 02:00 EDT
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
May 28, 22:00 EDT
Scheduled - We will be performing scheduled maintenance on Shield on Thu, May 28, 2026, at 10:00 PM ET.
This update includes essential database improvements and may result in brief delays in mail flow.

Maintenance Window: 4 hours
Expected Impact: Mail flow should not be impacted during the window.

Thank you for your understanding as we work to enhance Shield’s performance and reliability.
May 28, 12:12 EDT
May 28, 2026
Scheduled Maintenance for Shield
Completed - The scheduled maintenance has been completed.
May 28, 02:00 EDT
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
May 27, 22:00 EDT
Scheduled - We will be performing scheduled maintenance on Shield on Wed, May 27, 2026, at 10:00 PM ET.
This update includes essential database improvements and may result in brief delays in mail flow.

Maintenance Window: 4 hours
Expected Impact: Mail flow should not be impacted during the window.
Important Note: This will only cause a temporary delivery delay — no emails will be lost.

Thank you for your understanding as we work to enhance Shield’s performance and reliability.
May 27, 12:03 EDT
May 27, 2026
May 26, 2026

No incidents reported.

May 25, 2026

No incidents reported.

May 24, 2026

No incidents reported.

May 23, 2026

No incidents reported.

May 22, 2026

No incidents reported.

May 21, 2026

No incidents reported.

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