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.

Open Rate (OR)

Also known as: OR

The percentage of recipients who open an email. Useful in determining the overall health of an email send, but less useful than things like CTOR for determining subscriber engagement.

Calculated by dividing number of emails read by number of emails delivered, then multiplying by 100. Depends on images being enabled for a tracking pixel to work.

Additional Resources