Resolved after 19 hours 13 minutes, affecting Outbound Email Security and Outbound Email Security, on August 27, 2025.
Our team has received further feedback from Spamhaus earlier this morning. The listings were caused by an end user emailing a spamtrap/honeypot operated by Spamhaus. The honeypot domain is a typosquat of a well known brand and the emails sent were not malicious traffic. We have reached out to the MSP so they can advise their end user of the mistake/typo.
Affected components
Update timeline
- identified Aug 27, 2025, 01:40 PM UTC
We are aware that one of our outbound IP addresses was listed on Spamhaus' RBL. This IP has been removed from our sending relays and the team is actively working with Spamhaus to identify a root cause. At this time, we do not anticipate any ongoing impact to email delivery and we are closely monitoring for further reports. No action is required from end customers or partners.
- resolved Aug 28, 2025, 08:54 AM UTC
Our team has received further feedback from Spamhaus earlier this morning. The listings were caused by an end user emailing a spamtrap/honeypot operated by Spamhaus. The honeypot domain is a typosquat of a well known brand and the emails sent were not malicious traffic. We have reached out to the MSP so they can advise their end user of the mistake/typo.
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