One of the many mysteries of email marketing is the definition of key metrics - unfortunately, there are no standards, and it can be tricky to find out how they are calculated.

Lucky for you, Tamara Gielen over at Tamara’s Email Marketing Best Practices has posted a list of explanation, which includes a breakdown of formulas. When in doubt get the raw data and calculate yourself!

And as a reminder, our Quarterly Email Trend Reports, breakdown opens, clicks, and click-to-open rates as they are explained in the article.

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