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Practical guidance on disposable email detection

Guides, fraud prevention thinking, and product updates from the team building isitdisposable.com.

  • Validate Emails in Any App with Zapier

    Zapier email validation in one webhook step: POST each new signup to the check endpoint, filter on the returned action, and block disposable emails in Zapier for Typeform, Mailchimp, Google Sheets, or any trigger app, with warn and relay variants included.

    Guides7 minute read

  • Why Blocking Apple Hide My Email Is a Mistake

    "Do not block Apple Hide My Email. Relay addresses forward permanently to real people, so blocking privaterelay.appleid.com signups filters out privacy conscious paying customers while stopping no abuse. Here is the mechanical case, and the right way to handle relays.

    Guides8 minute read

  • Block Disposable Emails on Shopify

    Block disposable emails on Shopify where the platform actually allows it: gate customer registration and newsletter forms with one snippet in the theme editor, flag fake customer accounts with Shopify Flow, and keep every path failing open so a sale is never lost to Shopify email validation.

    Guides8 minute read

  • Your Bounce Rate Is Your Reputation

    Your email bounce rate is one of the loudest list-quality signals you emit, and the reputation it damages first is with your ESP, not Gmail. Hard bounce vs soft bounce, where the thresholds really live, where bounces come from, and how to reduce email bounce rate at the signup form.

    Guides8 minute read

  • Block Disposable Emails in Bubble

    Block disposable emails in Bubble with the API Connector: exact call configuration, a signup workflow branched on allow, warn, and block, plus the drop-in snippet path and backend workflows. Bubble email validation that fails open and never breaks a signup.

    Guides8 minute read

  • What Fake Signups Actually Cost You

    The cost of fake signups, line by line: wasted email spend, burned support time, abused trials, corrupted metrics, and ESP risk, with a worked example for a mid-size SaaS and a calculator to run your own numbers.

    Guides8 minute read

  • Block Disposable Emails on Webflow Forms

    Block disposable emails on Webflow with one script tag in your site's custom code, no backend required. The snippet path for no-code builders, a small intercept script for the technical tail, and a Make or Zapier route for webflow email validation downstream.

    Guides8 minute read