DMARC Spoof Detection, Vietnam
Clear Clear FilterThis page shows DMARC authentication failures originating from Vietnam. Learn more about this data.
Vietnam accounts for 133 DMARC authentication failures observed by sh4meful over the observation window, sourced from 59 distinct IP addresses across 20 networks. This represents approximately 0.2% of total failure volume observed. Activity from Vietnam has declined over the last 30 days compared with the prior 30-day period. The most active source is VNPT-VN with 23 failures across 15 IP addresses.
133
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Top Networks in Vietnam
Ten most active networks sourcing DMARC failures from Vietnam:
| Network | Organization | Failures | Distinct IPs | Top City |
|---|---|---|---|---|
| VNPT-VN | — | 23 | 15 | Hanoi |
| VIETTEL-VN | — | 20 | 14 | Hanoi |
| JETCLOUD-VN | — | 16 | 3 | — |
| FPT-NET | — | 10 | 2 | Ho Chi Minh City |
| HG-VN | — | 10 | 1 | — |
| DULIEUAZ-VN | — | 7 | 3 | — |
| SCLOUDPTELTD-SG | — | 2 | 2 | Ho Chi Minh City |
| VPSMMOCLOUD-VN | — | 7 | 2 | — |
| MINHTHOIPC-VN | — | 6 | 3 | — |
| HAINAMTECH-VN | — | 6 | 1 | — |
VNPT-VN and VIETTEL-VN together account for 38% of failure volume from this country. Distribution across many networks is consistent with commodity spoofing infrastructure operating from this geography.
Failure Activity Over Time
Peak activity was observed in the week of June 8, 2026 with 9 failures recorded. Activity in the most recent 30-day window declined sharply compared with the prior period (6 vs 26 failures).
Regional Context
Compared with peer geographies in South-Eastern Asia, Vietnam's failure volume is above the regional median. Countries in this region collectively contributed 0% of failures observed.
Failures
Showing 51-60 of 133 failures, affecting 185 messages| Date ▲ | Source IP | Country | City | Network | Messages |
|---|---|---|---|---|---|
| 2/24/2025 | VN Vietnam | 1 | |||
| 2/26/2025 | VN Vietnam | 1 | |||
| 3/5/2025 | VN Vietnam | 1 | |||
| 4/4/2025 | VN Vietnam | Vinh | 3 | ||
| 4/4/2025 | VN Vietnam | Thái Nguyên | 4 | ||
| 4/21/2025 | VN Vietnam | Hanoi | 4 | ||
| 5/10/2025 | VN Vietnam | Haiphong | 4 | ||
| 5/31/2025 | VN Vietnam | 2 | |||
| 6/3/2025 | VN Vietnam | Ho Chi Minh City | 6 | ||
| 6/13/2025 | VN Vietnam | Ho Chi Minh City | 1 |
What This Means
Country-level patterns don't imply that mail from Vietnam is inherently malicious. Many failures reflect misconfigured legitimate senders, forwarded messages that break authentication, or automated infrastructure operating without authorization. Domain owners investigating a specific failure should look at the source IP and network details rather than the country alone. Our DMARC guide explains how to interpret these signals in your own reports.