--- title: "Double Opt-In in Mailercloud: A Complete Guide" description: "Learn how Mailercloud’s double opt-in feature helps you build a clean, high-quality subscriber list." url: https://help.mailercloud.com/en/articles/164-double-opt-in-in-mailercloud-a-complete-guide collection: "Audience" updated: 2026-10-07 language: en --- # Double Opt-In in Mailercloud: A Complete Guide Learn how Mailercloud’s double opt-in feature helps you build a clean, high-quality subscriber list. ## What is Double Opt-In? Double opt-in is a process that adds an extra step of verification for your subscribers before they are added to your contact list. Instead of joining your list immediately after signup, new subscribers will first receive a confirmation email. They must click the verification link inside that email to complete their subscription. This practice ensures: - ✅ **Only valid email addresses** are collected. - ✅ **Spam sign-ups are reduced**, since fake or mistyped addresses cannot confirm. - ✅ **Improved deliverability and engagement**, because your lists contain genuinely interested and verified subscribers. 📌 **Example**: If a visitor signs up through your webform but enters a wrong email (like `john@gmial.com` instead of `john@gmail.com`), the confirmation will fail, and the invalid contact won’t be added. ## Benefits of Using Double Opt-In - **Higher-quality contact lists**: Keeps your database clean and free of bots or fake sign-ups. - **Compliance with regulations**: Supports GDPR and other data protection rules by ensuring clear consent. - **Brand trust**: Subscribers who confirm their emails are more engaged and less likely to mark your emails as spam. - **Better inbox placement**: ISPs often treat confirmed subscriber lists more favorably, improving overall inbox delivery rates. ## How to Enable Double Opt-In Follow these steps to activate double opt-in for your account: 1. **Log in** to your Mailercloud account. 2. Navigate to **Accounts → Preference tab**. 3. Locate the **Double Opt-In** section. 4. Use the toggle switch to **enable or disable** double opt-in. 🔹 By default, double opt-in is **disabled** for all clients. ## Double Opt-In for Webforms You can configure double opt-in at the **webform level** to ensure only verified subscribers are added when they use your forms. ### Steps: 1. Create or edit a webform. 2. Go to the **Options** tab. 3. Enable the **Double Opt-In** setting. 4. Publish your webform. Once enabled: - Every subscriber who submits the form will receive a confirmation email. - Only after clicking the confirmation link will the subscriber be added to your Mailercloud account. - Webforms will display **two counters**: - **Form Submission Count** – total number of submissions. - **Contact Confirmation Count** – number of subscribers who completed the confirmation. 📌 **Tip**: This helps you measure how many sign-ups are successfully verified. ## Double Opt-In for API and Integrations Double opt-in can also be applied to subscribers added via: - **Mailercloud API** - **Third-party integrations** (e.g., CRMs, signup tools) When enabled: - All new contacts added through these methods will **receive a confirmation email**. - Contacts will only appear in your account after confirming. This ensures that **external tools** feeding data into your Mailercloud account also follow the same quality standards. ## Security Options For an added layer of protection, you can enable **Cloudflare Turnstile** on the confirmation link. This prevents automated bots from confirming subscriptions. ### To enable Turnstile: 1. Go to **Accounts → Preference tab → Double Opt-In Settings**. 2. Under **Security Options**, toggle **Enable Turnstile on Confirm Subscription link**. 📌 **Why use it?** - Prevents bots and fake sign-ups from confirming subscriptions. - Ensures only real users complete the confirmation process. ## Configuring Confirmation Email You can fully customize the confirmation email that is sent to your subscribers. ### Steps to configure: 1. Go to **Accounts → Preference tab → Double Opt-In → Configure Settings**. 2. Under **Confirmation Email**, you can edit: - **From Name** – the sender name your subscribers will see. - **From Email** – the email address used to send the confirmation. - **Subject Line** – make it clear, e.g., “Confirm your subscription to \[Brand Name\]”. - **Reply-To Email** – optional email address for replies. - **Mail Preheader** – a short preview text that appears after the subject. - **Email Template** – customize the design and content of the confirmation email. - **Button text** – click the text on the button in the email preview and type your own, e.g. _Confirm my subscription_. Up to **100 characters**, plain text. If you leave it empty, it goes back to _Yes, subscribe me to this list_. Your new text is used in confirmation emails sent after you save. 3. After editing, click **Save and Continue**. 📌 **Best practice**: Keep the subject line short and clear (e.g., _“One last step – confirm your subscription!”_) to encourage quick confirmation. ## Thank You Page Settings After subscribers confirm their email, they are redirected to a **Thank You page**. You can set this up in two ways: 1. **Default Hosted Page** – Use Mailercloud’s built-in Thank You page. You can customize its content and design. 2. **Custom Redirect URL** – Redirect subscribers to your own webpage (e.g., a branded thank you page, or a page offering a welcome discount). 📌 **Example**: An e-commerce store can redirect confirmed subscribers to a “Thank you + 10% discount code” page. ## Limitations for Free Clients If you’re using a **Free Mailercloud account**, some limitations apply: - The confirmation email **template cannot be edited**. - The confirmation email’s **button text can’t be changed**. It shows a lock icon; clicking it offers an upgrade. - The confirmation email will **include Mailercloud branding**. - The **Custom Redirect URL** option is not available (only the default Thank You page can be used). ## Best Practices for Double Opt-In - Always use **clear language** in your signup forms so users know they’ll receive a confirmation email. - Customize the confirmation email subject line to increase open rates. - Regularly check **form submission vs. confirmation counts** to track engagement.