Mário Valney

<a href="https://wordpress.org/plugins/contact-form-7/" title="Install it first, of course" rel="ugc">Contact Form 7 (CF7)</a> is a awesome plugin used by 1+ million WordPress websites.
But even it allow users to use HTML instead of just Plain Text email it’s not trivial to users who aren’t developers create something really pro.
However, time to leave all your worries behind! As a recently launched “Contact Form 7 – HTML Mail Template Extension” will allow you, WordPress developers or not, to use a simply but beautiful HTML Template in your CF7 so users will get better emails than just amount of text.
<h4>Configurations</h4>
Easily and quickly! No configurations required to start, but you can change a lot of stuff like colors, header image and width (by now… new versions will come).
<h4>Email Template</h4>
The plugin applies a HTML template to email sent from your CF7. The Template is optimized to show your HTML emails perfectly in the most popular email browsers including mobile ones.

HTML Template for CF7

Improve your Contact Form 7 emails with a HTML Template.

Brian Mutende

Email Customizer is a lightweight Email Customizer Plugin For WordPress. Now works with WooCommerce 
★★★★★
With this plugin, you can convert the plain text emails that WordPress sends into beautiful HTML emails.
These include the emails that WordPress sends to users after they create an account on your website or request to reset their password.
The email customizer plugin wraps all your WordPress emails inside of a HTML template. As a result, the colors and appearance of your emails will match that of your website.
You can edit the email template and set text sizes, colors and backgrounds. You can also define custom CSS for your emails and it will be inlined inside the emails.
Noptin is a free and lightweight WordPress newsletter plugin. <a href="https://wordpress.org/plugins/newsletter-optin-box/" rel="ugc">Learn more</a>.

Email Customizer

Easily replace the plain text WordPress emails with beautiful HTML emails that match your brand colors. All without writing a single line of code.

HTML Template for CF7 vs Email Customizer