Did you know that 47% of email recipients open email based on the subject line alone? A subject line can also get an email reported as spam by recipients about 68% of the time.

In other words: your subject lines have the power to make or break your email marketing campaigns.

If you want to increase your open rates, you need to write better subject lines. The best way to write email subject lines for higher opens (instead of being marked as spam) is by leveraging natural human tendencies and psychological principles.

Basically, write like a person who is writing for other people.

Marketers with higher open rates craft email subject lines that their subscribers simply can’t resist. In this guide, we’ll share 164 best email subject line examples that will boost your email open rates and land you squarely in the 47%.