Outage in Mailosaur

Investigating issues with authentication and API services

Resolved Major
June 12, 2025 - Started 4 months ago - Lasted about 1 hour
Official incident page

Incident Report

We are experiencing issues with authentication and core services related to an upstream issue with Google Cloud services (https://status.cloud.google.com/) We will provide updates as soon as we have them, but hope to have normal service resumed shortly.
Components affected
Mailosaur POP3 (995) Mailosaur SMTP (2525) Mailosaur SMTP (587) Mailosaur SMTP (25) with STARTTLS Mailosaur SMTP (2525) with STARTTLS Mailosaur SMTP (587) with STARTTLS Mailosaur POP3 (110) Mailosaur SMTP (25) Mailosaur API Mailosaur App
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Latest Updates ( sorted recent to last )
RESOLVED 4 months ago - at 06/12/2025 08:20PM

This incident has now been resolved.

MONITORING 4 months ago - at 06/12/2025 07:33PM

Google have now resolved the issue affecting our services - we are continue to monitor the situation.

IDENTIFIED 4 months ago - at 06/12/2025 07:14PM

A further update has been provided by Google - "Our engineers are continuing to mitigate the issue and we have confirmation that the issue is recovered in some locations. We do not have an ETA on full mitigation at this point."

Incident page: https://status.cloud.google.com/incidents/ow5i3PPK96RduMcb1SsW

IDENTIFIED 4 months ago - at 06/12/2025 07:05PM

The following update has been provided by Google - "Our engineering team continues to investigate the issue. We will provide an update by Thursday, 2025-06-12 12:15 PDT with current details."

Incident page: https://status.cloud.google.com/incidents/ow5i3PPK96RduMcb1SsW

IDENTIFIED 4 months ago - at 06/12/2025 06:55PM

We are experiencing issues with authentication and core services related to an upstream issue with Google Cloud services (https://status.cloud.google.com/)

We will provide updates as soon as we have them, but hope to have normal service resumed shortly.

Latest Mailosaur outages

Some customers unable to forward emails - 2 months ago
Mailosaur UI is experiencing degraded performance - over 1 year ago
Intermittent connectivity issues for SMTP and POP3 - over 1 year ago
SMS messages not being delivered to some numbers - almost 2 years ago
Degraded performance on US phone numbers - over 2 years ago

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