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Formidable Forms — WordPress Anti-Spam Plugin

Blacklist Unwanted Email – Formidable Forms

by abahalkar · WordPress.org page · Website

v1.0 Tested up to WP 5.3.23

Formidable Forms has 100+ active installs on WordPress.org and 3,054 downloads all time. We have tracked it since September 4, 2026; download trends appear after 30 days of data. The last update was on October 17, 2019, tested up to WordPress 5.3.23.

Formidable Forms at a glance

Active installs
100+
Total downloads
3,054
Downloads, last 30 days
–
available after 30 days of tracking
30-day growth
–
tracking since September 4, 2026

Is Formidable Forms well maintained?

Support threads resolved
No open threads
nothing waiting on the WordPress.org forum
WordPress compatibility
Behind
tested up to WordPress 5.3.23, not yet with the current 7.1

Features

The feature list from the plugin's own readme on WordPress.org, trimmed to the essentials.

  • Restrict free domains (e.g. gmail.com, yahoo.com, etc.) from registrations and submissions
  • Block to registrations and submissions from a specific form
  • Block a specific email field in case there are multiple email fields in the form
  • Inbuilt plugin functionalities offers blacklisting around 4750+ free and spam domains
  • Restrict your competitors from access & spying to your valuable resources

Formidable Forms reviews and ratings

1 reviews on WordPress.org, with the most recent ones as their authors posted them.

All reviews
5.0 out of 5

1 reviews

5★
1
4★
0
3★
0
2★
0
1★
0

  • Simple & AWESOME!

    Desperately needed functionality to block certain domains from submitting a Formidable form. A quick Google search led me to this plugin. I was iffy because it had no reviews, hadn't been tested on recent WP versions, and the website/links were broken. However, the plugin worked! Super simple and easy to understand. Thank you!

    coconutmonkey

Details

This is a free add-on plugin for Formidable Forms , which validates the email field and restrict unwanted email submission as well as allowed only bus …

The full description, screenshots and every review live on the WordPress.org page.

Rankings Formidable Forms competes in

Tags

  • Blacklist email domain for formidable forms
  • block email
  • Block email domain for formidable forms
  • formidable forms
  • spam

More from abahalkar

Version
1.0
Last updated
Oct 17, 2019
First published
Oct 17, 2019
Requires WordPress
–
Tested up to
5.3.23
Requires PHP
–
Pricing
Free on WordPress.org

Formidable Forms FAQ

What does Formidable Forms do?

According to its WordPress.org readme, Formidable Forms offers Restrict free domains (e.g. gmail.com, yahoo.com, etc.) from registrations and submissions, Block to registrations and submissions from a specific form, Block a specific email field in case there are multiple email fields in the form, Inbuilt plugin functionalities offers blacklisting around 4750+ free and spam domains and Restrict your competitors from access & spying to your valuable resources.

How many active installs does Formidable Forms have?

WordPress.org reports 100+ active installs for Formidable Forms as of September 7, 2026.

Is Formidable Forms still maintained?

The last release was on October 17, 2019, more than a year ago. WordPress.org shows a warning on plugins that go this long without an update.

Is Formidable Forms free?

Formidable Forms is free to install from WordPress.org. Many plugins also sell a paid version or add-ons.