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● free trial — limited to the first 5 captured hits.

The free trial is designed to help you test the product. Your first 5 hits are fully visible; any additional hits will be captured but their details will remain locked. Email alerts are included on FREE, but captured SMTP sender, recipient, subject and body remain locked. Upgrade to unlock full evidence, all captures and up to 360 days of retention.

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cntasrvf.pingback.sh

DEMO ONLY DEMO ONLY · created 2026-06-10 12:22 · expires 2028-06-11 · free · 14 days retention

0 selected
5-hit cap
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Pro feature locked

This action needs a Pingback Pro key.

✓ SVG / PDF / XML / DTD / HTML payload files
✓ Built for upload-based SSRF, XXE & blind callbacks
✓ Pro listeners keep captures longer for delayed hits
Upgrade to Pro →

Listener settings

Add an email address to receive a simple alert whenever a callback arrives.

You'll receive an email on every stored hit. SMTP alerts confirm delivery without revealing the captured message on FREE.
Discord, Telegram and generic webhooks are available on Pro.
Internal tag to help you remember which test this listener is for.