Pascal CESCATO

Newsletter Optin Block allows you to automatically inject a Contact Form 7 form into your WordPress posts and add subscribers to a Mailjet list of your choice.
<ul>
<li>Select the Mailjet list in the admin</li>
<li>WordPress repository compatible (escaping, sanitization, etc.)</li>
<li>Robust API error handling</li>
<li>Works without Composer</li>
</ul>
External services: 
Mailjet API – allows: 
– fetching Mailjet contact lists (https://api.mailjet.com/v3/REST/contactslist) 
– adding a subscriber and returning a response code (https://api.mailjet.com/v3/REST/contacts)
<h3>License</h3>
This plugin is distributed under the GPLv3 license.

Newsletter Optin Block

Automatically injects a Contact Form 7 form into posts and syncs subscribers with a Mailjet list.

Youdemus

Contact Form 7 to Mailjet is a plugin developed by Youdemus.
This plugin allows you to automatically fill in a contact list on Mailjet, or database, each time a user submits a contact form on your WordPress website with Contact Form 7.
The huge benefit of this plugin is that it allows you to create a specific email’s database on Mailjet to distinguish contacts from your site. You can also specify a specific list for each of your forms.
This plugin requires that the official Mailjet plugin is properly configured (API). This is not an official Contact Form 7 plugin or Mailjet plugin.
It is also possible to associate a check box for the GPRD if you have one in your contact form.
For help in installation, please check FAQ or contact us directly.
<a href="https://www.youdemus.fr/contactez-nous/" rel="nofollow ugc">Support</a>

Contact Form 7 to Mailjet

Just remember that the first field must be the email shortcode from CF7. By default, it's "your-email". 

Save my life :-)

Link Contact Form 7 with Mailjet contact list

Newsletter Optin Block vs Contact Form 7 to Mailjet