MFA: Voice Call & Email 2FA with ClickSend & SMTP

This n8n workflow implements robust multi-factor authentication (MFA) by combining voice calls and email verification. It begins with a Form Trigger where users input phone number, voice preferences (male/female, language), email, and name. A verification code is generated and formatted for clear voice delivery, then sent via ClickSend API as a spoken message. Users confirm the code before proceeding to email verification using SMTP.

The workflow ensures security by validating the voice code first—if correct, it advances to sending an email with the same code for dual verification. This sequential approach minimizes false positives and enhances user trust in authentication processes.

Ideal for IT/security teams, login systems, or signup flows in web apps. Benefits include time-saving automation of 2FA, integration of niche services like ClickSend for global voice support, and customizable languages/voices. It reduces manual verification efforts, supports international numbers, and scales for high-volume use cases like customer onboarding or account recovery.