DMARC Spoof Detection, Colombia

Ten most active networks sourcing DMARC failures from Colombia:

Telmex Colombia S.A. and COLOMBIA TELECOMUNICACIONES S.A. ESP BIC together account for 53% of failure volume from this country. Distribution across many networks is consistent with commodity spoofing infrastructure operating from this geography.

Peak activity was observed in the week of August 10, 2026 with 25 failures recorded. Activity in the most recent 30-day window declined sharply compared with the prior period (0 vs 32 failures).

Compared with peer geographies in South America, Colombia's failure volume is above the regional median. Countries in this region collectively contributed 7% of failures observed.

Country-level patterns don't imply that mail from Colombia 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.