IP Address: 139.138.34.153 âš Network Confounder
âš Network Confounder Detected: Cisco Secure Email/Ironport
Cloud Email Security sometimes breaks SPF and DKIM at the endpoint. Unclear if this is a configuration issue or byproduct the interception of email
Cloud Email Security sometimes breaks SPF and DKIM at the endpoint. Unclear if this is a configuration issue or byproduct the interception of email
About this Data
â–¶The data here is from DMARC analysis for domains I administer, drawn from a larger dataset (comprising millions of authentication records and messages). These entries are from email attempts that failed both SPF and DKIM (and there are often alignment issues - hidden here). In many cases, these failures indicate unauthorized use of the domain name, and are commonly associated with spoofing, phishing, or other abusive mail activity.
Geolocation Information
- Country:
- US United States
- Coordinates:
- 37.751, -97.822
WHOIS Information
- Network Name:
- CISL-7
- CIDR:
139.138.24.0/21, 139.138.32.0/20- Reverse DNS:
-
esa.hc5995-21.iphmx.com
Last updated: 2/5/2026
Failures Detected from this IP
Showing 1-24 of 24 (failures, affecting 41 messages)| Date â–¼ | Messages |
|---|---|
| 6/27/2025 | 1 |
| 5/16/2025 | 1 |
| 4/30/2025 | 1 |
| 3/28/2025 | 1 |
| 2/26/2025 | 1 |
| 12/19/2024 | 3 |
| 12/18/2024 | 2 |
| 12/17/2024 | 2 |
| 12/5/2024 | 1 |
| 12/4/2024 | 2 |
| 11/22/2024 | 1 |
| 11/20/2024 | 2 |
| 11/13/2024 | 1 |
| 11/12/2024 | 1 |
| 11/8/2024 | 2 |
| 9/27/2024 | 3 |
| 9/18/2024 | 2 |
| 9/13/2024 | 3 |
| 8/7/2024 | 2 |
| 6/26/2024 | 3 |
| 6/12/2024 | 1 |
| 5/31/2024 | 1 |
| 5/10/2024 | 3 |
| 4/17/2024 | 1 |