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Outage in Exclaimer

Some messages are marked Undeliverable 'blocked using Spamhaus'

Resolved Minor
December 05, 2025 - Started 5 months ago - Lasted 5 days
Official incident page

Incident 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. We have consistently noted that we are removed from the list automatically. However, we have implemented preventive action to reduce the impact on customers.

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Latest Updates ( sorted recent to last )
RESOLVED 5 months ago - at 12/10/2025 09:53AM

No further instances of Exclaimer IPs being added to the Spamhaus eXploits Blocklist have occurred over the past 48 hours.

If you're experiencing issues when sending messages, please don't hesitate to reach out to our support team, who can investigate further. https://support.exclaimer.com/hc/en-gb

MONITORING 5 months ago - at 12/08/2025 03:17PM

We have now re-enabled email flow to return to all server IPs and have not noted any further blocks against the IP address at this time. Our Engineers are continuing to monitor the service with increased vigilance and have reached out to Spamhaus to investigate the cause of the intermittent blocks further.

If you're experiencing issues when sending messages, please don't hesitate to reach out, and a member of our team will be able to investigate further.

INVESTIGATING 5 months ago - at 12/05/2025 02:55PM

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.

We have consistently noted that we are removed from the list automatically. However, we have implemented preventive action to reduce the impact on customers.

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