DMARC Spoof Detection, Canada
Clear Clear FilterThis page shows DMARC authentication failures originating from Canada. Learn more about this data.
Canada accounts for 25 DMARC authentication failures observed by sh4meful over the observation window, sourced from 15 distinct IP addresses across 10 networks. This represents approximately 0.3% of total failure volume observed. Activity from Canada has declined over the last 30 days compared with the prior 30-day period. The most active source is GRCINC-2 with 5 failures across 1 IP address.
25
15
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Top Networks in Canada
Ten most active networks sourcing DMARC failures from Canada:
| Network | Organization | Failures | Distinct IPs | Top City |
|---|---|---|---|---|
| GRCINC-2 | — | 5 | 1 | — |
| BELL-ICNEN21 | — | 4 | 1 | Montreal |
| Oblivus | — | 4 | 1 | Montreal |
| TUCOW-BLK01 | — | 4 | 4 | — |
| BELLNEXXIA-11 | — | 3 | 3 | Gatineau |
| NON-RIPE-NCC-MANAGED-ADDRESS-BLOCK | — | 1 | 1 | — |
| MC-733 | — | 1 | 1 | — |
| RIM-CORP-01 | — | 1 | 1 | Kitchener |
| OVH-ARIN-8 | — | 1 | 1 | Montreal |
| BIGPIPE-4 | — | 1 | 1 | Vancouver |
GRCINC-2 and BELL-ICNEN21 together account for 57% 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 20, 2026 with 3 failures recorded. Activity in the most recent 30-day window declined sharply compared with the prior period (1 vs 7 failures).
Regional Context
Compared with peer geographies in Northern America, Canada's failure volume is below the regional median. Countries in this region collectively contributed 59% of failures observed.
Failures
Showing 1-10 of 25 failures, affecting 44 messages| Date ▼ | Source IP | Country | City | Network | Messages |
|---|---|---|---|---|---|
| 8/4/2026 | CA Canada | 1 | |||
| 7/21/2026 | CA Canada | Montreal | 1 | ||
| 7/20/2026 | CA Canada | Montreal | 2 | ||
| 7/14/2026 | CA Canada | 2 | |||
| 7/10/2026 | CA Canada | Montreal | 1 | ||
| 7/10/2026 | CA Canada | Montreal | 1 | ||
| 3/25/2026 | CA Canada | Gatineau | 1 | ||
| 12/9/2025 | CA Canada | Gatineau | 1 | ||
| 10/10/2025 | CA Canada | Gatineau | 1 | ||
| 2/25/2025 | CA Canada | Kitchener | 1 |
What This Means
Country-level patterns don't imply that mail from Canada 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.