Neutrope Inc.

Neutrope Quiet Shield adds lightweight spam and unsolicited-sales filtering to 
Contact Form 7 submissions. The idea is simple: let spam and cold sales 
mail be received quietly without disturbing the people running the site.
Each submission is scored against a small set of checks you control:
<ul>
<li>Japanese character ratio: flag messages with too little Japanese text.</li>
<li>URL limit: flag messages that contain more links than you allow.</li>
<li>Submission speed: flag forms submitted suspiciously fast after they were 
shown. The timing value is signed so it cannot be tampered with.</li>
<li>Repeat submissions: flag three or more submissions from the same visitor 
within five minutes.</li>
<li>NG words: flag messages containing any keyword from your own list.</li>
</ul>
When a submission is flagged you choose what happens with Quiet Mode:
<ul>
<li>Quiet Mode on (default): the visitor sees the normal success message, but 
no mail is sent. The reason is written to the log.</li>
<li>Quiet Mode off: the submission is stopped with the standard Contact Form 
7 error message.</li>
</ul>
The plugin is deliberately small. It makes no external network requests, 
creates no database tables, and shows no ads or upsells. Configuration is 
stored in a single option, and the log keeps only decision metadata plus a 
short, salted IP hash. Message bodies, e-mail addresses and names are never 
stored.
If Contact Form 7 is not active, the plugin still activates safely and 
shows an admin notice instead of causing an error.
This plugin is an independent add-on and is not affiliated with or endorsed 
by the authors of Contact Form 7.
<h3>Features</h3>
<ul>
<li>Five independent checks, each configurable from one settings page.</li>
<li>Quiet Mode to silently drop flagged mail or stop it with an error.</li>
<li>Dashboard with today’s passed and blocked counts and a recent activity 
log.</li>
<li>Tamper-evident submission-speed measurement using a signed field.</li>
<li>IP addresses are hashed, never stored in raw form.</li>
<li>No external requests, no tracking, no database tables, no ads.</li>
<li>GPL-2.0-or-later. The full license text is bundled in the LICENSE file.</li>
</ul>
<h3>License</h3>
This plugin is licensed under the GPL-2.0-or-later. The full license text 
is included in the bundled LICENSE file. 
License URI: https://www.gnu.org/licenses/gpl-2.0.html

Neutrope Quiet Shield

Quietly deflect spam and unsolicited sales messages sent through Contact Form 7. Lightweight, no external calls, no stored personal data.

Ralf Weber

No more SPAM by spiders scanning your site for email addresses. With CryptX you can hide all your email addresses, with and without a mailto-link, by converting them using javascript or UNICODE.
CryptX protects your email addresses from spambots while keeping them readable and functional for your visitors. The plugin automatically detects email addresses in your content and encrypts them using various methods including JavaScript encryption, Unicode conversion, and image replacement.
Key Features:
<ul>
<li>Automatic Email Detection – Finds and encrypts email addresses in posts, pages, comments, and widgets</li>
<li>Multiple Encryption Methods – JavaScript, Unicode, image replacement, and custom text options</li>
<li>Widget Support – Works with text widgets and other widget content</li>
<li>RSS Feed Control – Option to disable encryption in RSS feeds</li>
<li>Whitelist Support – Exclude specific domains from encryption</li>
<li>Per-Post Control – Enable/disable encryption on individual posts and pages</li>
<li>Shortcode Support – Use <code>[cryptx]email@example.com[/cryptx]</code> for manual encryption</li>
<li>Template Functions – Developer-friendly functions for theme integration</li>
</ul>
<a href="http://weber-nrw.de/wordpress/cryptx/" title="Plugin Homepage" rel="nofollow ugc">Plugin Homepage</a>

CryptX

No more SPAM by spiders scanning your site for email addresses!

Neutrope Quiet Shield vs CryptX