Description
FixBounce Email Verifier checks if every email address on your site actually exists — not just if it looks valid, but if the mailbox is real. Install, activate, and you’re protected immediately. No account needed.
How It Works
Every email submitted on your site (registration, comment, contact form, checkout) is verified through the FixBounce API:
- Syntax check — Is the email properly formatted?
- Disposable domain check — Is it a throwaway address? (350+ domains blocked)
- MX record check — Does the domain have a mail server?
- SMTP mailbox verification — Does the actual mailbox exist?
- Catch-all detection — Does the domain accept any address?
- Deliverability score — Deliverable, Risky, or Undeliverable
All 6 checks run on every verification. The only difference between plans is how many verifications per day.
Plans
- Trial (no signup) — 5 verifications/day. All features. Install and go.
- Free account — 10 verifications/day. Create a free account at fixbounce.com and add your API key.
- Pro ($29/mo) — 500 verifications/day + bulk user verification.
What Gets Protected
- Registration — Blocks signups with fake or non-existent emails
- Comments — Stops comments from disposable or invalid addresses
- Contact forms — Real-time validation on Contact Form 7, WPForms, Gravity Forms, Elementor, Ninja Forms, and any HTML form
- WooCommerce — Verifies billing email before order is placed
When the daily limit is reached
Verification pauses until the next day. Forms, registrations, and comments work normally — they just skip the email check. A notice appears in the admin dashboard with upgrade options.
Privacy
Only the email address is sent to the FixBounce API for verification. No other user data is transmitted. See our privacy policy.
Installation
- Upload the
fixbounce-email-verifierfolder to/wp-content/plugins/ - Activate the plugin through the ‘Plugins’ menu
- Go to Settings FixBounce
- Toggle the features you want — that’s it
No API key is required. You get 5 free verifications per day immediately.
To increase your limit, create a free account at fixbounce.com, copy your API key from Dashboard API Keys, and paste it in Settings FixBounce.
FAQ
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Do I need to create an account?
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No. The plugin works immediately with 5 verifications per day. No signup, no API key, no configuration beyond toggling features on. Create an account later to get 10/day (free) or 500/day (Pro).
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What happens when I hit the daily limit?
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Verification pauses — forms, registrations, and comments continue to work normally without email checking. A notice appears in your admin dashboard. The limit resets every 24 hours.
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What does each verification check?
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Every single verification runs all 6 checks: email syntax, disposable domain (350+ blocked), MX record, SMTP mailbox existence, catch-all detection, and deliverability scoring. There are no “basic” vs “premium” checks — you always get the full verification.
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Does it work with my form plugin?
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Yes. Real-time validation auto-detects any email input field. Works with Contact Form 7, WPForms, Gravity Forms, Elementor, Ninja Forms, Formidable, and any HTML form.
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Will it slow down my site?
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No. Verification runs via AJAX after the user finishes typing (800ms debounce). Zero impact on page load speed.
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Is it compatible with Akismet?
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Yes. FixBounce verifies email addresses, Akismet analyzes content. They complement each other.
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Does it work with WooCommerce?
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Yes. Toggle “WooCommerce checkout” in settings. Bad billing emails get blocked before the order is placed.
Reviews
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Contributors & Developers
“FixBounce Email Verifier” is open source software. The following people have contributed to this plugin.
Contributors
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Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
1.0.0
- Initial release
- Full SMTP email verification (5/day free, no signup)
- Registration, comment, form, and WooCommerce protection
- Real-time inline form validation
- Daily usage meter with upgrade prompts
- API key integration for higher limits