Sh4mefulNetwork: SENDGRID-149-72-0-0-16
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 SENDGRID-149-72-0-0-16 network. Learn more about this data.
Analysis
This network has contributed 5 unique IP addresses across 38 failed authentication events, accounting for 1,490 messages. Activity from this network spans from March 9, 2024 to January 14, 2026. Activity from SENDGRID-149-72-0-0-16 (Twilio), a email delivery service, has been observed from United States.
Failures Detected from this Network
Showing 1-38 of 38 (failures, affecting 1,490 messages)| Date Ⲡ| Source IP | Country | Messages |
|---|---|---|---|
| 3/9/2024 | US | 1 | |
| 3/12/2024 | US | 149 | |
| 3/12/2024 | US | 143 | |
| 3/12/2024 | US | 169 | |
| 3/13/2024 | US | 259 | |
| 3/13/2024 | US | 313 | |
| 3/13/2024 | US | 284 | |
| 5/10/2024 | US | 2 | |
| 9/17/2024 | US | 2 | |
| 9/25/2024 | US | 1 | |
| 9/26/2024 | US | 2 | |
| 9/26/2024 | US | 1 | |
| 10/22/2024 | US | 1 | |
| 10/22/2024 | US | 2 | |
| 11/8/2024 | US | 1 | |
| 11/11/2024 | US | 2 | |
| 11/11/2024 | US | 2 | |
| 11/20/2024 | US | 10 | |
| 11/20/2024 | US | 12 | |
| 11/20/2024 | US | 7 | |
| 11/21/2024 | US | 1 | |
| 12/9/2024 | US | 1 | |
| 12/11/2024 | US | 23 | |
| 12/11/2024 | US | 31 | |
| 12/11/2024 | US | 22 | |
| 12/17/2024 | US | 1 | |
| 12/19/2024 | US | 6 | |
| 12/19/2024 | US | 6 | |
| 12/19/2024 | US | 4 | |
| 12/20/2024 | US | 6 | |
| 12/20/2024 | US | 6 | |
| 12/20/2024 | US | 5 | |
| 4/11/2025 | US | 1 | |
| 5/23/2025 | US | 5 | |
| 5/23/2025 | US | 4 | |
| 5/23/2025 | US | 3 | |
| 9/6/2025 | US | 1 | |
| 1/14/2026 | US | 1 |