# Double Opt-In > Double opt-in helps prove that a Subscriber controls the email address they submitted. In Mailrith, you configure double opt-in on forms and landing pages so each signup path can have its own confirmation email, success experience, and saved privacy evidence. - Human page: https://mailrith.com/docs/double-opt-in - Markdown page: https://mailrith.com/docs/double-opt-in.md - Category: Subscriber Management - Reading time: 8 min read - Last updated: 2026-06-13 - Related keywords: Double Opt-In, Double Opt-In documentation, Subscriber Management, Subscriber Management documentation, Mailrith documentation, Mailrith help, What Double Opt-In Does, Set Up Double Opt-In On A Form, Set Up Double Opt-In On A Landing Page, Confirmation Experience, Review Double Opt-In Activity, Where It Applies, Troubleshooting, Tags, Forms, Public Subscriber Experience ## AI Agent Notes - Use this article as step-by-step Mailrith product guidance, not as legal, financial, or deliverability advice unless the article says so. - Preserve exact Mailrith UI labels from the steps when explaining a workflow. - Prefer Mailrith's product term Subscribers when referring to people on an email list. ## What this guide covers Use form and landing-page confirmation emails so Subscribers confirm their email address before they become fully subscribed, with confirmation evidence saved in the Subscriber privacy history. ## Sections - What Double Opt-In Does - Set Up Double Opt-In On A Form - Set Up Double Opt-In On A Landing Page - Confirmation Experience - Review Double Opt-In Activity - Where It Applies - Troubleshooting ## Visual Reference ![Mailrith forms page where signup forms are managed.](https://mailrith.com/docs/screenshots/forms.png) Enable double opt-in in a form or landing page submit settings when that signup path should require confirmation. ## What Double Opt-In Does Double opt-in asks a person to confirm their email address before Mailrith treats the signup as Active. In Mailrith, double opt-in is configured on the form or landing page that collects the signup. Use double opt-in when you need stronger proof that the email address owner asked to subscribe. It also helps protect deliverability because mistyped addresses and someone else's email address do not become Active unless the address owner confirms. Mailrith saves the confirmation outcome and can show confirmation-link engagement from the Subscriber's **History** tab. ## Set Up Double Opt-In On A Form 1. Click **Forms** in the left sidebar. 2. Click the form you want to edit, or click **Create Form** and choose a template. 3. Open **Settings** > **Form Submit**. 4. Turn on **Double Opt-In**. 5. Click **Compose Double Opt-In Email**. 6. Review the **Subject** and **Email Body**. Keep the confirmation link in the email body. 7. Under **On Confirmation Success**, choose **Show success message** and write the message, or choose **Redirect to a page** and enter the full URL. 8. Click **Save Email**. 9. Click **Save Form**. 10. Submit the form with a test email address and confirm that Mailrith sends the confirmation email. ## Set Up Double Opt-In On A Landing Page 1. Click **Landing Pages** in the left sidebar. 2. Click the landing page you want to edit, or create a new landing page. 3. Make sure the page has a form block. 4. Open **Settings** > **Page Submit**. 5. Turn on **Double Opt-In**. 6. Click **Compose Double Opt-In Email**. 7. Review the **Subject**, **Email Body**, and **On Confirmation Success** settings. 8. Click **Save Email**. 9. Click **Save Landing Page**. 10. Submit the public landing page with a test email address and confirm that the Subscriber stays Unconfirmed until they click the confirmation link. ## Confirmation Email And Success Page The confirmation email should have one clear job: ask the Subscriber to click the confirmation link. Keep it short, remind the Subscriber what they asked to join, and avoid extra offers or unrelated links. After the Subscriber clicks the confirmation link, Mailrith can show a success message or redirect them to a URL you provide. - **Success message:** best for a simple confirmation, such as "Thank you for subscribing." - **Redirect URL:** best for a welcome page, download page, webinar confirmation page, or onboarding screen. ## Review Double Opt-In Activity 1. Click **Subscribers** in the left sidebar. 2. Search for the Subscriber by email address or name. 3. Click the Subscriber row to open the profile drawer. 4. Open **History**. 5. Review the signup and confirmation activity for that Subscriber. ## Where Double Opt-In Applies Double opt-in applies to the form or landing page where you turned it on. Subscriber tags still help with targeting and organization, but tags no longer decide whether a signup needs confirmation. Public Mailrith form and landing-page submissions can use their own double opt-in settings. Zapier subscriber actions and Facebook Lead Ads sync do not expose a double opt-in switch and do not send these confirmation emails. Use a Mailrith form or landing page when a signup path must require confirmation before the Subscriber becomes Active. ## Troubleshooting Double Opt-In - **The confirmation email is not sending:** confirm the workspace has an enabled [Email Delivery Connection](https://mailrith.com/docs/email-delivery-connections.md). - **The form or page cannot be saved:** make sure the confirmation subject and body are not blank when double opt-in is enabled. - **The link is missing from the email:** add the confirmation link token back into the email body. - **The redirect URL is rejected:** enter a complete URL that starts with `https://` whenever possible. - **A Subscriber is still Unconfirmed:** ask them to open the latest confirmation email and click the confirmation link. ## Related Guides - [Tags](https://mailrith.com/docs/tags.md): Tags are a fast way to categorize subscribers. Apply tags through imports, forms, automations, and magic links. Then use those tags as targeting filters anywhere you send email in Mailrith. - [Forms](https://mailrith.com/docs/forms.md): Forms collect subscribers directly into Mailrith. Combine email capture, custom field inputs, and tag assignment in one builder. Then embed the form on any website with a single code snippet. - [Public Subscriber Experience](https://mailrith.com/docs/public-subscriber-experience.md): Public subscriber pages and links are what subscribers see outside the logged-in app. This guide explains form submissions, confirmations, unsubscribe links, tracking events, and the checks to run before publishing.