Sh4mefulIP Address: 2a01:111:f403:c103::5 â IP Confounder
Exchange Online Protection (EOP) is a cloud-based email filtering service included with all Microsoft 365 subscriptions to protect against spam, malware, and phishing attacks. It automatically secures mailboxes by filtering incoming and outgoing messages in real-time using anti-spam, anti-malware, and content filters. During periods of active campaign activity, these can largely be ignored (esp. when recipients are on Exchange). However, forged emails have been observed from Microsoft infrastructure that have this signature too.
According to reverse-DNS, this is a host domain utilized by Microsoft 365 (formerly Office 365) to manage and secure outbound email traffic. It acts as a mail transfer agent (MTA) that filters outgoing messages to prevent spam and malicious content. Format: .outbound.protection.outlook.com. However, we've seen actual spoof attempts and SPAM from MS infrastructure so not classing this a confounder.
This page shows DMARC authentication failure data for this IP address. Learn more about this data.
Geolocation Information
- Country:
- CA Canada
- Region:
- Ontario
- City:
- Toronto
- Coordinates:
- 43.6547, -79.3623
WHOIS Information
- Network Name:
- UK-MICROSOFT-20060601
- Owner:
- ORG-MA42-RIPE
- Reverse DNS:
-
mail-canadacentralazlp170110005.outbound.protection.outlook.com
Last updated: 2/5/2026
Analysis
This IP was first observed on February 14, 2025 and most recently on February 28, 2026. It has been associated with 16 failed authentication events affecting 20 messages, representing moderate activity. The IP belongs to UK-MICROSOFT-20060601 (ORG-MA42-RIPE), a network with activity associated with Canada.
External Reputation Lookups
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