DuoCircle experienced a major incident on December 8, 2025, lasting 1d. The incident has been resolved; the full update timeline is below.
Update timeline
- investigating Dec 08, 2025, 07:24 PM UTC
We are aware of an issue affecting SpamSentinel where email attachments may be stripped and replaced with a report file. Email remains protected by Cloudmark's zero-hour anti-virus technology during this time. Workaround: Navigate to Anti-Virus & Attachments → Anti-Virus and set "Enable Anti-Virus" to Disable . View screenshot We will provide updates as more information becomes available.
- investigating Dec 08, 2025, 07:35 PM UTC
Intial investigation shows that this issue on only impacting users who have restarted the spamsentinel agent in the past 48 hours.
- resolved Dec 09, 2025, 07:47 PM UTC
We pushed out a fix to the Domino customers who could be automatically updated as of 8:20 AM UTC. SpamSenitnel for Exchange customers had the fix applied in our cloud infrastructure at 16:20 UTC. We are in the process of contacting customers who need manual intervention for updates.