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Blocks risky email sends in Gmail, Front & Zendesk based on external domains, attachments, or PII detection Email Send Guard helps prevent accidental data leaks by showing a confirmation popup before sending messages when potential risk is detected. Works on Gmail (mail.google.com) Front (app.frontapp.com) Zendesk Agent Workspace (*.zendesk.com) When it warns you A warning appears before sending if any of the following are detected: 1. PII in the message body (e.g., email addresses, phone numbers, SSN-like patterns, PAN-like patterns) 2. Sensitive attachments (e.g., .pdf, .csv, .xls, .xlsx, .zip) 3. External recipients / risky recipient patterns based on your organization’s internal domains (e.g., @infeedo.com) What happens Click Send / Submit If risk is detected, a popup appears listing the reasons Choose: Cancel (stops sending) Send Anyway (proceeds) Privacy Runs locally in your browser as a content script on supported sites. Does not require account sign-in. Does not store message content.
Apr 1, 2026
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Media assets
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Listing exposes a developer website URL.
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Listing exposes a contact email.
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Case-insensitive substring match in the name.
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Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
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