The best way to improve the results of your campaigns and optimize your investment is
send only to contacts who actually interact with your sendings
.Now it's very easy to do this, just select this option:
If many of your contacts don't open your emails, it's very likely that Gmail, Hotmail, and other providers will start to categorize your mailings as spam, or simply don't deliver them. That's why it's so important to send to lists with a high level of interaction.
To learn more about this new feature, visit este artículo in the help center