OTP by Email for Contact Form 7
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A small Contact Form 7 extension plugin to enable email confirmation by unique links sent to the email inbox.
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.
This plugin is available for download for your site.