Maurice Hason

Limesnip Simple2FA adds email-based two-factor authentication to your site. After entering their username and password, users receive a 6-digit verification code via email that they must enter to complete login.
Features:
<ul>
<li>Email-based 2FA – no authenticator app required</li>
<li>Clean, Linear-inspired verification UI</li>
<li>Auto-advancing digit inputs with paste support</li>
<li>Auto-submit when all digits are entered</li>
<li>Role-based enforcement – choose which roles require 2FA</li>
<li>Configurable code expiration and max attempts</li>
<li>Optional “Remember this device” feature</li>
<li>HTML and plain text email support</li>
<li>Secure code storage (SHA-256 hashed)</li>
<li>Fully responsive design</li>
</ul>

Limesnip Simple2FA

Simple email-based two-factor authentication for WordPress. Adds a clean, Linear-inspired verification screen to your login flow.

Aurovrata Venet

Use this CF7 extension to enable OTP links to be inserted into confirmation/notification emails sent to email addresses submitted through your CF7 forms. The OTP is a unique link the email inbox user needs to click to confirm their address. The link is valid by default for 72 hours and can be customised.

OTP by Email for Contact Form 7

A small Contact Form 7 extension plugin to enable email confirmation by unique links sent to the email inbox.

Limesnip Simple2FA vs OTP by Email for Contact Form 7