Outage in Mesh
[EU/US] Outbound IP RBL Listing
Resolved MinorIncident Report
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.
Need to monitor Mesh 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
6 months ago - at 08/28/2025 08:54AM
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.
IDENTIFIED
6 months ago - at 08/27/2025 01:40PM
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.
Latest Mesh outages
Email Processing Delays - US - 1 day ago
Email Processing Delays - US - 2 days ago
Emails slow to process on Mesh 365 (US only) - 18 days ago
Slow Message Delivery to Microsoft Services - 22 days ago
Slow Message Delivery to Microsoft Services - 23 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
