Structural evasion: plain-text body encoded with base64 Content-Transfer-Encoding
plaintext-body-base64-cte
What this tier means
High-confidence threat indicator — phishing, impersonation, BEC, or scam pattern. Strong contributor to the trash decision.
How Gorganizer detects this
Structural evasion technique: the email uses Content-Transfer-Encoding: base64 for a plain-text body with no HTML counterpart. Legitimate plain-text email uses 7bit or quoted-printable encoding — base64 on a plain-text body is a deliberate choice by evasion toolkits to bypass keyword scanners that operate on raw MIME bytes. Only fires when the decoded body also contains 2+ bulk/marketing patterns (unsubscribe, limited time, click here, etc.) to avoid false positives on unusual but legitimate CTE choices. Score: +2.
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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