BIMI logo checkmark on lookalike phishing domain (brand impersonation via VMC certificate)
bimi-on-lookalike-domain
What this tier means
High-confidence threat indicator — phishing, impersonation, BEC, or scam pattern. Strong contributor to the trash decision.
How Gorganizer detects this
BIMI (Brand Indicators for Message Identification) is a standard that allows email providers like Gmail to show a blue brand logo checkmark next to verified senders. Attackers register lookalike domains (paypa1.com, app1e.com, amaz0n.net) and obtain VMC (Verified Mark Certificates) so Gmail renders a trusted logo even though the domain is not the real brand. This signal fires when the Authentication-Results header contains bimi=pass AND the header.from domain in that result matches a known lookalike/typosquat pattern. Users who see the checkmark may trust the email unconditionally — making this a high-confidence phishing indicator. Score: +4.
False-positive guard
Every signal in Gorganizer feeds a multi-module score — never a sole verdict. This is a threat-tier signal — it adds a strong contribution to the trash score. The full pipeline still requires convergence across multiple modules + a margin over the safety floor before deletion happens, and Gmail's trash (30-day recovery) is always used — never permanent delete.
About the scoring engine
Gorganizer's scoring engine emits over 1,800 signals across six modules — headers, sender, subject, body, attachments, and structural metadata. Every email is scored by every module independently; the final verdict requires multiple modules to agree and the trash score to beat the safety floor by a margin.
Sacred safety guards — never delete starred emails, replies, calendar invites, receipts/invoices, or attachments — apply unconditionally regardless of any signal.
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