Sh4mefulNetwork: TWILI-11
Twilio SendGrid is a cloud-based Email Service Provider (ESP), or Mail Transfer Agent (MTA). It operates as a high-volume, cloud-based SMTP service to send, receive, and relay both transactional and marketing emails. These signals could be indicative of a failure during legitimate sends (through Sendgrid), or could be signal of a spam/spoof attempt using their service which is common enough we're not treating this as a confounder.
This page shows DMARC authentication failures originating from the TWILI-11 network. Learn more about this data.
Analysis
This network has contributed 10 unique IP addresses across 94 failed authentication events, accounting for 1,577 messages. Activity spans from March 6, 2024 to September 30, 2025, with peak volume in March 2024 (427 events). The top countries by failure volume are United States (100%). The most active source IPs from this network include 159.183.224.102 (282 failures), 159.183.224.100 (275 failures), 159.183.224.108 (263 failures). A single IP dominates activity from TWILI-11 (Twilio), suggesting a concentrated or persistent source rather than distributed infrastructure.
Failures Detected from this Network
Showing 51-94 of 94 failures, affecting 1,577 messages| Date ▼ | Source IP | Country | Messages |
|---|---|---|---|
| 1/17/2025 | US | 13 | |
| 1/17/2025 | US | 8 | |
| 1/8/2025 | US | 9 | |
| 1/8/2025 | US | 5 | |
| 12/20/2024 | US | 6 | |
| 12/20/2024 | US | 6 | |
| 12/19/2024 | US | 6 | |
| 12/19/2024 | US | 5 | |
| 12/18/2024 | US | 1 | |
| 12/17/2024 | US | 1 | |
| 12/17/2024 | US | 1 | |
| 12/11/2024 | US | 36 | |
| 12/11/2024 | US | 19 | |
| 12/4/2024 | US | 5 | |
| 12/4/2024 | US | 1 | |
| 11/20/2024 | US | 10 | |
| 11/20/2024 | US | 7 | |
| 11/19/2024 | US | 3 | |
| 11/19/2024 | US | 2 | |
| 11/13/2024 | US | 1 | |
| 11/11/2024 | US | 2 | |
| 10/23/2024 | US | 2 | |
| 10/22/2024 | US | 1 | |
| 10/22/2024 | US | 1 | |
| 10/22/2024 | US | 1 | |
| 9/27/2024 | US | 1 | |
| 9/26/2024 | US | 2 | |
| 9/26/2024 | US | 1 | |
| 9/25/2024 | US | 1 | |
| 9/19/2024 | US | 1 | |
| 9/19/2024 | US | 1 | |
| 9/19/2024 | US | 1 | |
| 9/17/2024 | US | 2 | |
| 9/17/2024 | US | 1 | |
| 9/12/2024 | US | 2 | |
| 9/12/2024 | US | 1 | |
| 9/12/2024 | US | 2 | |
| 3/16/2024 | US | 1 | |
| 3/13/2024 | US | 277 | |
| 3/13/2024 | US | 276 | |
| 3/12/2024 | US | 159 | |
| 3/12/2024 | US | 161 | |
| 3/10/2024 | US | 1 | |
| 3/6/2024 | US | 1 |