DMARC Spoof Detection, Vietnam
Clear Clear FilterThis page shows DMARC authentication failures originating from Vietnam. Learn more about this data.
Vietnam accounts for 140 DMARC authentication failures observed by sh4meful over the observation window, sourced from 66 distinct IP addresses across 22 networks. This represents approximately 1.3% of total failure volume observed. Activity from Vietnam has increased over the last 30 days compared with the prior 30-day period. The most active source is VIETTEL-VN with 25 failures across 19 IP addresses.
140
66
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Top Networks in Vietnam
Ten most active networks sourcing DMARC failures from Vietnam:
| Network | Organization | Failures | Distinct IPs | Top City |
|---|---|---|---|---|
| VIETTEL-VN | — | 25 | 19 | Hanoi |
| VNPT-VN | — | 23 | 15 | Hanoi |
| JETCLOUD-VN | — | 16 | 3 | — |
| FPT-NET | — | 10 | 2 | Ho Chi Minh City |
| DULIEUAZ-VN | — | 7 | 3 | — |
| HG-VN | — | 10 | 1 | — |
| SCLOUDPTELTD-SG | — | 2 | 2 | Ho Chi Minh City |
| VPSMMOCLOUD-VN | — | 7 | 2 | — |
| MINHTHOIPC-VN | — | 6 | 3 | — |
| ADM-VN | — | 6 | 1 | — |
VIETTEL-VN and VNPT-VN together account for 41% 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 July 27, 2026 with 10 failures recorded. Activity in the most recent 30-day window increased sharply compared with the prior period (16 vs 10 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 3% of failures observed.
Failures
Showing 1-10 of 140 failures, affecting 205 messages| Date ▼ | Source IP | Country | City | Network | Messages |
|---|---|---|---|---|---|
| 8/6/2026 | VN Vietnam | Hanoi | 3 | ||
| 8/6/2026 | VN Vietnam | Ho Chi Minh City | 3 | ||
| 7/27/2026 | VN Vietnam | Ho Chi Minh City | 3 | ||
| 7/27/2026 | VN Vietnam | Ho Chi Minh City | 1 | ||
| 7/27/2026 | VN Vietnam | Rach Gia | 3 | ||
| 7/27/2026 | VN Vietnam | 3 | |||
| 7/26/2026 | VN Vietnam | Ho Chi Minh City | 4 | ||
| 7/9/2026 | VN Vietnam | Hanoi | 1 | ||
| 7/6/2026 | VN Vietnam | Ho Chi Minh City | 2 | ||
| 6/27/2026 | VN Vietnam | 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.