Can PluginView detect SmtpJS without logging in?

Yes. PluginView only reads publicly accessible responses when checking for SmtpJS — typically script sources. It does not bypass authentication or paywalls.

What category is SmtpJS?

SmtpJS is classified under Email in the PluginView directory.

How many fingerprint rules cover SmtpJS?

This reference currently tracks 1 fingerprint rule across script sources. Individual rule bodies are proprietary and are not published.

What public signals suggest a site uses SmtpJS?

Illustrative public indicators for SmtpJS include smtpjs.com/v/?smtp.js. A live scan may match additional proprietary rules beyond these examples.

Detect SmtpJS

SmtpJS is a free library you can use for sending emails from JavaScript.

Detection looks at script sources across 1 fingerprint rules among the site's public responses.

Websites using SmtpJS

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Signal classes

PluginView evaluates public page signals in these classes when identifying SmtpJS. Individual fingerprint rule bodies are proprietary and are not published.

Script sources

Example public indicators for SmtpJS

Illustrative indicators derived from public catalog metadata for SmtpJS. A live scan may match additional proprietary rules beyond these examples.

smtpjs.com/v/?smtp.js

What a detection means

Establishes: One or more public signals on the scanned page matched a known SmtpJS signature (1 rules) at the time of the scan.
Does not establish: A sitewide install of SmtpJS, an active vendor contract, exclusive use, or that SmtpJS is still in place today.

How to check a site for SmtpJS

1. Enter the website URL in the scan form — homepage, pricing, checkout, or login pages usually expose the strongest SmtpJS signals.
2. PluginView reads only public responses (script sources) and scores them against the SmtpJS signature set (1 rules).
3. Review the confidence score and text explanation for SmtpJS on the results page.

FAQ: detecting SmtpJS

Can PluginView detect SmtpJS without logging in?: Yes. PluginView only reads publicly accessible responses when checking for SmtpJS — typically script sources. It does not bypass authentication or paywalls.
What category is SmtpJS?: SmtpJS is classified under Email in the PluginView directory.
How many fingerprint rules cover SmtpJS?: This reference currently tracks 1 fingerprint rule across script sources. Individual rule bodies are proprietary and are not published.
What public signals suggest a site uses SmtpJS?: Illustrative public indicators for SmtpJS include smtpjs.com/v/?smtp.js. A live scan may match additional proprietary rules beyond these examples.