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.