![Top 40 Sales Email Subject Lines [2025]](https://cdn.optinmonster.com/wp-content/uploads/2022/09/top-40-best-sales-email-subject-lines.png)
Do you want to write the best email subject lines that can help increase sales and revenue? Well, you’re not alone. The average email open rate is around 17%, but you can push it up to 30% by following best email practices. This is especially important if you’re writing cold email subject lines for sales …

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