Marketers must preview and test their email campaigns before sending them. This helps ensure the email design displays as expected in the subscribers’ inboxes, and that it offers the best possible user experience. Email testing is also a great way to make sure customized elements, such as personalized and dynamic content, are working correctly.

Before hitting the “Send” button, test that your email looks good on all devices. But devices are not the only thing to think about. You should also make sure that your email marketing renders well across the major email clients (Gmail, Outlook, Yahoo!…).
To preview your campaigns before sending them to your email list, choose an email marketing software offering the following testing functionalities:
Result
Testing and previewing the campaign you’ve designed in multiple ways will help ensure it displays as expected in your subscribers' inboxes.