Long base64-like blob in subject — classifier-evasion / tracking token fingerprint
subject-base64-blob
What this tier means
High-confidence threat indicator — phishing, impersonation, BEC, or scam pattern. Strong contributor to the trash decision.
How Gorganizer detects this
The subject line contains a 30+ character contiguous blob of base64 character set (`[A-Za-z0-9+/=]`) with at least 3 uppercase and 3 lowercase letters. This is a classifier-evasion pattern: spammers and phishing-campaign tools embed these blobs as tracking tokens or per-recipient salt so every subject line tokenizes to a unique fingerprint, defeating frequency-based spam filters that watch for subject-line repetition across a campaign. The 30-char length floor and 3-of-each-case requirement are calibrated to reject false positives: git commit SHAs are 40 hex chars but pure lowercase (fail the uppercase-count check); UUIDs have dashes that break the contiguous-blob match AND are typically all lowercase; Salesforce IDs are 15-18 chars (below length floor); JIRA tickets are short and dash-broken; CI build IDs are usually below 30 chars and single-case. Weight: +3 — moderate. Some niche legit systems (calendar invites with long opaque IDs, certain auto-generated notification mailers) may occasionally cross the threshold, so the signal pairs with other evidence rather than solo-triggering.
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 2,143+ 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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