The Email Marketing Glossary

Your guide to all the acronyms and terms in the email world you always wanted. A project from Jason Rodriguez, The Better Email, and a bunch of email friends. Contribute on GitHub.

Double Opt-In

A method of confirming consent from subscribers that requires them to take an action after the initial signup to confirm their subscription. This usually takes the form of clicking a link in an email.

Additional Resources

  • Single Opt-In vs. Double Opt-In: The Verdict on Email Permission, Litmus
  • What is double opt-in in email marketing?, HubSpot
  • All That You Need to Know About Double Opt-In Email Marketing, Mailmunch
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The Email Marketing Glossary is your guide to all the acronyms and terms in the email world you always wanted. A project from Jason Rodriguez, The Better Email, and a bunch of email friends.

© Jason Rodriguez. Released under the MIT License.
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