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About Double Opt-in

To help you build a better audience, Mailchimp confirms that subscribers signed up to receive your emails. Learn the benefits of the opt-in process and how it works.

Single Opt-in vs. Double Opt-in

Single opt-in and double opt-in are two settings for your signup form, that have different processes and methods.

Brazilian Data Protection FAQs

Get answers to common questions about Mailchimp and the Brazilian Data Protection Regulation (LGPD).

General Data Protection Regulation FAQs

Get answers to common questions about Mailchimp and the General Data Protection Regulation (GDPR).

Where to Edit Template Code

With Mailchimp's template language, you can code an email template right from your account. Learn how to add template images and find your template's HTML.

Troubleshoot the Opt-in Confirmation Email

If people are signing up for your list and aren't receiving some of the emails that are part of the double opt-in process, here are some things to check.

Translate the Mailchimp Embed Code

With Mailchimp, you can embed signup forms right on your site. Learn how to translate these forms using custom code.

Choose Opt-in Settings

Your Mailchimp audiences can be set to either single opt-in or double opt-in signup. Learn how to set your opt-in preferences.

My email looks different in Outlook

If your email looks different in Outlook, it may have to do with the version of Outlook rendering the campaign. Get tips for fixing common issues in Outlook.

About the General Data Protection Regulation

The GDPR regulates how organizations process the personal data of EU citizens, including organizations located outside of the EU.