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

EverPress

Xaver

Mailster Newsletter Plugin

<blockquote>
This Plugin requires <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Mailjet" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a>
</blockquote>
Uses Mailjet to deliver emails for the <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Mailjet" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a>.
Read the <a href="https://kb.mailster.co/send-your-newsletters-via-mailjet?utm_campaign=wporg&utm_source=Mailjet&utm_medium=readme" rel="nofollow ugc">Setup Guide</a> to get started.
<h3>Additional Info</h3>
This Plugin requires <a href="https://mailster.co/?utm_campaign=wporg&utm_source=wordpress.org&utm_medium=readme&utm_term=Mailjet" rel="nofollow ugc">Mailster Newsletter Plugin for WordPress</a>

Mailster Mailjet

Uses Mailjet to deliver emails for the Mailster Newsletter Plugin for WordPress.

Contact Form 7 to Mailjet vs Mailster Mailjet