Update - Microsoft continues to experience intermittent mail delivery issues.
So far, we are only observing temporary SMTP 4xx errors, with no permanent 5xx failures reported. Messages affected by these errors will continue to be deferred and automatically retried.
Examples of the responses we're receiving from Microsoft:
421 4.3.2 The maximum number of concurrent connections
451 4.7.0 Temporary server error. Please try again later.
You may also see errors in GoSecure reports similar to:
redcondor.net.ConnectionException: core.iio.ConnectionExpiryException: WAITING: 60.000s
This indicates a connection timeout. Essentially, GoSecure was communicating with the destination mail server but did not receive the expected response within 60 seconds.
These messages are also deferred and automatically retried.
GoSecure services remain operational, and we will continue monitoring Microsoft's delivery responses.
Nov 12, 2026 - 12:18 PST
So far, we are only observing temporary SMTP 4xx errors, with no permanent 5xx failures reported. Messages affected by these errors will continue to be deferred and automatically retried.
Examples of the responses we're receiving from Microsoft:
421 4.3.2 The maximum number of concurrent connections
451 4.7.0 Temporary server error. Please try again later.
You may also see errors in GoSecure reports similar to:
redcondor.net.ConnectionException: core.iio.ConnectionExpiryException: WAITING: 60.000s
This indicates a connection timeout. Essentially, GoSecure was communicating with the destination mail server but did not receive the expected response within 60 seconds.
These messages are also deferred and automatically retried.
GoSecure services remain operational, and we will continue monitoring Microsoft's delivery responses.
Nov 12, 2026 - 12:18 PST
Monitoring - Microsoft 365 / Exchange Online Service Disruption
Microsoft is currently investigating issues affecting Exchange Online. Users may experience difficulty connecting to their mailboxes, and GoSecure is observing temporary delivery failures when attempting to deliver messages to Microsoft 365.
GoSecure services are operating normally. Messages receiving temporary delivery failures from Microsoft are being deferred and will automatically retry delivery.
We are currently seeing the following response from Microsoft:
`421 4.3.2 The maximum number of concurrent connections per resource forest has exceeded a limit, closing transmission channel.`
These temporary failures do not indicate that messages have been lost. Deferred messages will continue to retry automatically, and normal delivery should resume once Microsoft's service issues are resolved.
Microsoft's current service advisory:
Microsoft is investigating reports of users experiencing issues accessing Exchange Online mailboxes through multiple connection methods in the Americas.
Additional information is available in the Microsoft 365 admin center under incident EX1550543.
Nov 12, 2026 - 10:55 PST
Microsoft is currently investigating issues affecting Exchange Online. Users may experience difficulty connecting to their mailboxes, and GoSecure is observing temporary delivery failures when attempting to deliver messages to Microsoft 365.
GoSecure services are operating normally. Messages receiving temporary delivery failures from Microsoft are being deferred and will automatically retry delivery.
We are currently seeing the following response from Microsoft:
`421 4.3.2 The maximum number of concurrent connections per resource forest has exceeded a limit, closing transmission channel.`
These temporary failures do not indicate that messages have been lost. Deferred messages will continue to retry automatically, and normal delivery should resume once Microsoft's service issues are resolved.
Microsoft's current service advisory:
Microsoft is investigating reports of users experiencing issues accessing Exchange Online mailboxes through multiple connection methods in the Americas.
Additional information is available in the Microsoft 365 admin center under incident EX1550543.
Nov 12, 2026 - 10:55 PST
About This Site
Welcome to the GoSecure Status and Alerts page. On this page you will find information regarding maintenance windows, system issues that may affect your organization's use of the product and updates on releases, patches and maintenance windows.
MXDR (Managed Extended Detection and Response)
Operational
EDR
Operational
NGAV
Operational
Patch Management
Operational
Vulnerability Management
Operational
SIEMaaS
Operational
IDR (Inbox Detection and Response)
Operational
Hosted Email Security
Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance