Krzysztof Busłowicz

[This plugin is outdated and no longer maintained. Please use the much easier Honeypot for CF7 instead.]
Adds double opt-in functionality to CF7 forms submissions. Double opt-in means that form submitters have to confirm their identity by their email account. The plugin is ready for translation.
Double opt-in dependencies
This plugin is an add-on to <a href="https://wordpress.org/plugins/contact-form-7/" rel="ugc">Contact Form 7</a> plugin by Takayuki Miyoshi. 
Functionality of this plugin also depend on installing and activating one of the plugins, which saves Contact Form 7 submissions to WordPress database. At the time, compatible plugins are:
<ul>
<li><a href="https://wordpress.org/plugins/flamingo/" rel="ugc">Flamingo</a> by Takayuki Miyoshi</li>
<li><a href="https://wordpress.org/plugins/contact-form-cfdb7/" rel="ugc">Contact Form 7 Database Addon – CFDB7</a> by Arshid</li>
</ul>
Note that BOTH Contact Form 7 and one of the listed above plugins are required for double opt-in functionality to work.
Help and Docs
The first and most complete documentation is located on <a href="https://sirta.pl/double-opt-in-for-contact-form-7-documentation/" rel="nofollow ugc">plugin official page</a>. 
If you’re a developer, feel free to take a look at <a href="https://github.com/elkurczako/Double-Opt-in-for-CF7" rel="nofollow ugc">the plugin page on GitHub repository</a>. 
You can also seek for help on WordPress support forum.
Plugin features
<ul>
<li>One click conversion of existing CF7 forms into double opt-in enabled forms.</li>
<li>URL parameters encryption to make confirmation links safe.</li>
<li>HTML email templates with mail tags similar to used in CF7 plugin. If you know how to configure CF7 emails, double opt-in will be easy.</li>
<li>Automatic creation of the “opt-in” page to process confirmed submissions.</li>
<li>Adding a CSV file attachment to final submission email containing form data.</li>
<li>Adding file attachment to final confirmation email sent to the submitter.</li>
<li>Setting expiration time for submissions to be confirmed.</li>
<li>Ability to manually confirm forms. That can be useful if your submitter enters an invalid email address, and you are sure you want to send their submission anyway.</li>
</ul>
Additional enhancements
Apart from its main feature, Double Opt-in for CF7 adds some functions you may find nice and useful:
<ul>
<li>Custom, accessible file upload inputs for your forms which look better, can be CSS styled and allow easy selecting and deselecting files to upload. This works for every CF7 form, not only double opt-in enabled.</li>
<li>Custom, more specific validation errors for radio buttons and checkboxes for improved accessibility.</li>
<li>Option to change CSV separator when exporting submissions from Flamingo plugin. It also adds BOM to CSV exports, allowing them to be properly opened in MS Excel. </li>
<li>Additional column on Flamingo Inbound Messages screen indicating if submission is complete or still waiting for being confirmed by sender.</li>
</ul>
What is double opt-in and why use it:
Double opt-in is the safe way of receiving site visitor’s submitted input. Used with contact forms or online questionnaires or with user registration, it helps to reduce spam submissions. With GDPR laws, double opt-in is a strongly recommended way of getting user data. Because submitters have to confirm their identity from their email address, you can reduce risk of processing personal data without permission. Double – means here that user submitting the data has to give consent by checking checkbox option and additionally confirm their email-address. 
Do not forget to set acceptance field in your CF7 form if GDPR is in concern!
How Double opt-in form works:
When someone fills and submits a form with double opt-in functionality, the first CF7 email goes back to THEM. There is a confirmation link in that email, which the submitter has to click on or paste in their web browser. The link has two encrypted parameters: submission serial number and submitter email address. The page with “opt-in” slug validates the parameters with submission stored in WordPress database and initiates sending of final emails to recipient set in “All Opt-In Forms” settings. If validation fails or when submission has expired, no emails are sent. If there are no specified parameters in the URL, visitors of the “opt-in” page are redirected to “404” page.
Plugin translation
Double Opt-In can be easily translated. It is released with the translation to Polish language.

Double Opt-in for CF7

This plugin adds a double opt-in functionality to CF7 forms.

Sébastien SERRE

Grégory Viguier

Chouby

Emmanuel Hesry

hugod

Sylvain Schellenberger

Marianne

With Polylang fully integrated to WordPress and using only its built-in core features (taxonomies), keep steady performances on your site and create a multilingual site featuring from just one extra language to 10 or more depending on your needs. There is no limit in the number of languages added and WordPress’ language packs are automatically downloaded when ready.
<h4>Features</h4>
Depending on the type of site you have built or are planning to build, a combination of plugins from the list below might be of interest. 
All plugins include a wizard allowing to setup them in just a few clicks.
<h3>Polylang</h3>
Polylang and <a href="https://polylang.pro" rel="nofollow ugc">Polylang Pro</a> share the same core providing features such as:
<ul>
<li>Translating posts, pages, media, categories, post tags, custom post types and taxonomies, RSS feeds; RTL scripts are supported.</li>
<li>The language is either set by the language code in URL, or you can use a different sub-domain or domain per language.</li>
<li>Automatic copy of categories, post tags and other metas when creating a new post or page translation.</li>
<li>Translating classic menus and classic widgets. Also accessible with <a href="https://wordpress.org/plugins/fse-classic/" rel="ugc">Site Editor Classic Features</a> in block themes.</li>
<li>Customizable language switcher available as a classic widget or a classic navigation menu item.</li>
<li>Compatibility with Yoast SEO.</li>
</ul>
<h3>Polylang Pro</h3>
Helps optimizing the time spent translating your site with some very useful extra features such as:
<ul>
<li>Better integration in the new Block Editor.</li>
<li>Language switcher available as a block.</li>
<li>Language options available in the widget block editor.</li>
<li>Template parts translatable in the site editor (FSE).</li>
<li>Duplicate and/or synchronize content across post translations.</li>
<li>Improved compatibility with other plugins such as <a href="https://polylang.pro/doc/working-with-acf-pro/" rel="nofollow ugc">ACF Pro</a>.</li>
<li>Share the same URL slug for posts or terms across languages.</li>
<li><a href="https://polylang.pro/doc/translating-urls-slugs/" rel="nofollow ugc">Translate URL slugs</a> for categories, author bases, custom post types and more…</li>
<li>Machine translation with DeepL.</li>
<li>Export and import of content in XLIFF format for outsourced professional translation.</li>
<li>Access to a Premium Support for personalized assistance.</li>
</ul>
<h3>Polylang for WooCommerce</h3>
<a href="https://polylang.pro/downloads/polylang-for-woocommerce/" rel="nofollow ugc">Add-on</a> for the compatibility with WooCommerce which provides features such as:
<ul>
<li>Translating WooCommerce pages (shop, check-out, cart, my account), product categories and global attribute terms directly in the WooCommerce interface.</li>
<li>Translating WooCommerce e-mails and sending them to customers in their language.</li>
<li>Products metadata synchronization.</li>
<li>Compatibility with the native WooCommerce CSV import & export tool.</li>
<li>Compatibility with popular plugins such as WooCommerce Subscriptions, Product Bundles, WooCommerce Bookings, Shipment Tracking and more.</li>
<li>Ability to use the WooCommerce REST API (available with Polylang Pro).</li>
<li>Access to a Premium Support for personalized assistance.</li>
</ul>
<h4>Our other free plugins</h4>
<ul>
<li><a href="https://wordpress.org/plugins/wpml-to-polylang/" rel="ugc">WPML to Polylang</a> allows migrating from WPML to Polylang.</li>
<li><a href="https://wordpress.org/plugins/fse-classic/" rel="ugc">Site Editor Classic Features</a> allows to use classic widgets (including the Polylang language switcher) and menus in the site editor (FSE).</li>
</ul>
<h4>Credits</h4>
Thanks a lot to all translators who <a href="https://translate.wordpress.org/projects/wp-plugins/polylang" rel="nofollow ugc">help translating Polylang</a>. 
Thanks a lot to <a href="http://www.alexlopez.rocks/" rel="nofollow ugc">Alex Lopez</a> for the design of the logo. 
Most of the flags included with Polylang are coming from <a href="http://famfamfam.com/" rel="nofollow ugc">famfamfam</a> and are public domain. 
Wherever third party code has been used, credit has been given in the code’s comments.

Polylang

Works great for the translations of a WordPress website

Great plugin for i18n


If i need multilingual solution, only polylang


Good plugin


Faster and lighter than WPML, easy to configure and manage.


Fast, easy to use, reliable

works fine!


A few quirks here and there, but handles this complicated task very, very well, and with a good interface. 🫶


Simply marvelous


If you are using FSE then you cant translate templates and this makes the polylang useless


Not working with basic tool - native wordpress editor


The only issue is you cannot pair existing translations - or if there this feature already exists, I haven't found it. Otherwise it works well.


I am very happy with free version


Thanks to developers of this excellent work.Many filter hooks and functions to use for developers.Using built-in core tables on database is smart.


Great Work


It works very well, even with block themes, as long as it's used together with Site Editor Classic Features.



Thank you!


Works great, thank you!


Plugin cumpri com tudo que promete, simples de ser instalado e tudo que tiver duvida o forum resolve os problemas.



Vale muito a pena a versão free dele da para desenvolver muito projeto com ele.


Excelente


It does what it needs to do and is free!


Works great

Nice and easy!


This plugin works great for creating multilingual websites. I have been using it on a couple of my websites and it does its work perfectly.


Works like a charm!

Go multilingual in a simple and efficient way. Keep writing posts and taxonomy terms as usual while defining their languages all at once.

Double Opt-in for CF7 vs Polylang