Outage in Exclaimer
Some messages are marked Undeliverable 'blocked using Spamhaus'
Resolved MinorIncident Report
Exclaimer Engineers are aware of an ongoing issue where one of our Server IPs looks to have been added to the Spamhaus eXploits Blocklist on multiple occasions.
Spamhaus is advising that the IP has already been removed from the List. Our engineering team is currently investigating the issue for more information.
Components affected
Exclaimer Mail Routing - Office 365Need to monitor Exclaimer outages?
- Monitor all your external dependencies in one place
- Get instant alerts when outages are detected
- Be the first to know if service is down
- Show real-time status on private or public status page
- Keep your team informed
Latest Updates ( sorted recent to last )
RESOLVED
20 days ago - at 01/19/2026 08:56PM
This incident has been resolved, and a Postmortem will be provided shortly.
MONITORING
about 1 month ago - at 01/09/2026 04:32PM
After monitoring mail flow through Exclaimer, we have confirmed there's been no further messages reported as blocked due to the Spamhaus Blocklist since 14:53GMT.
Exclaimer Engineers have reached out to Spamhaus to discuss the issue at this time and to obtain more information on the resulting action that added this IP to the blocklist.
INVESTIGATING
about 1 month ago - at 01/09/2026 02:51PM
Exclaimer Engineers are aware of an ongoing issue where one of our Server IPs looks to have been added to the Spamhaus eXploits Blocklist on multiple occasions.
Spamhaus is advising that the IP has already been removed from the List. Our engineering team is currently investigating the issue for more information.
Latest Exclaimer outages
Exclaimer Cloud Portal not loading as expected - 4 days ago
Message delivery issues - 6 days ago
Client-side signature Reporting Issue - 12 days ago
The Status Page Aggregator with Early Outage Detection
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 trialNo credit card required · Cancel anytime · 5850 services available
Integrations with
