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Run a timed email-verified quiz with n8n forms, SMTP and data tables

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Created by: Mugdha Vairagade || vmugdha
Mugdha Vairagade

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Last update 6 hours ago

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Quick overview

This workflow runs an email-verified, timed quiz using n8n Forms, n8n Data Tables, and SMTP email sending, including resend limits, one-attempt-per-email enforcement, random question selection, automatic scoring, and saving results.

How it works

  1. Receives a quiz sign-up through an n8n Form with a name and email address.
  2. Normalizes and validates the entry, checks n8n Data Tables to see if the email has already participated, and applies per-email and per-hour rate limits for verification codes.
  3. If allowed, generates a 6-digit verification code, sends it via SMTP email, and logs only a SHA-256 hash of the code to the quiz_codes n8n Data Table.
  4. Prompts the participant to enter the emailed code in a second n8n Form and verifies it against the latest stored hash while enforcing code expiry and a maximum number of attempts.
  5. When the code is valid, creates a participant record in the quiz_results n8n Data Table and selects 10 random multiple-choice questions plus 1 feedback question from the quiz_questions n8n Data Table.
  6. Presents the timed quiz form, then scores submitted answers (or records a timeout/late submission), updates the participant’s result in n8n Data Tables, and shows the score completion page when applicable.

Setup

  1. Create an SMTP credential (for example Cloudflare Email Routing/Email Sending over SMTP) and update the sender details used to send the verification email.
  2. Run the one-time manual setup path to create the quiz_codes and quiz_results n8n Data Tables.
  3. Create and populate a quiz_questions n8n Data Table with columns qid, type, difficulty, text, options, answer, and active, ensuring at least 10 active mcq questions (4 options separated by |) and at least 1 active text question.
  4. Activate the workflow and share the public URL of the entry form so participants can start the sign-up process.

Requirements

    1. Three data tables - quiz_questions, quiz_codes, quiz_results created from the provided CSV files. 2. Claudeflare SMTP credential with

Customization

  • Change the time limit and the difficulty mix in Pick Questions1.
  • Change the code expiry and resend limits in Check Request.
  • Edit the result messages in Score Answers1.