Outage in Exclaimer

Emails are getting Pending/Defer Status when sending Emails

Resolved Minor

January 22, 2026 - Started 3 months ago - Lasted 3 days
Official incident page

Incident Report

We are currently investigating an issue affecting email delivery within our Exclaimer services. Email routed through Exchange Online may be impacted due to an ongoing Microsoft incident (MO1221364).

Components affected

Exclaimer Mail Routing - Office 365 Exclaimer Mail Routing - Office 365 Exclaimer Mail Routing - Office 365 Exclaimer Mail Routing - Office 365 Exclaimer Mail Routing - Office 365 Exclaimer Mail Routing - Office 365

Trusted by 1,000+ teams

Never miss outages in third-party dependencies

Stop finding out about outages from your users. Monitor 6,320+ cloud services and get alerted the second something breaks.

Start Free Trial Learn More

Latest Updates ( sorted recent to last )

RESOLVED 3 months ago - at 01/26/2026 02:33PM

No further issues with mail flow have been identified over the weekend that were caused by this incident. If you are continuing to experience issues with your Exclaimer Subscription, please don't hesitate to reach out, and our team will be more than happy to assist.

MONITORING 3 months ago - at 01/23/2026 06:38AM

We are continuing to monitor for any further issues.

MONITORING 3 months ago - at 01/23/2026 06:32AM

We have confirmed that Microsoft has deployed a fix to address the issue and confirmed resolution for Incident (MO1221364). We are continuing to monitor the service for stability.

INVESTIGATING 3 months ago - at 01/23/2026 02:39AM

We are currently investigating an issue affecting email delivery within our Exclaimer services. Email routed through Exchange Online may be impacted due to an ongoing Microsoft incident (MO1221364).

Latest Exclaimer outages

Microsoft incident causing issues with signature imprinting and the portal in multiple regions - 6 days ago

Multiple signatures appearing in some messages - 15 days ago

Possible Routing issues within MEA & US region for Microsoft Customers - 26 days ago

Issues accessing Exclaimer Portal for some users - 29 days ago

Server side emails bouncing - Error message - Need Mail Command - 30 days ago

Never miss outages in third-party dependencies

With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.

Start free trial

No credit card required · Cancel anytime · 6320 services available

Integrations with Slack Microsoft Teams Google Chat Datadog PagerDuty Zapier Discord Webhook