Inbox testing allows you to view your email campaign across various popular email client inboxes.
To do this, click on Create and then on Campaigns.
Find the email campaign you have created and wish to inbox test, then click on the Options link next to it.
Now click on the Start Inbox Test button.
Finally click on Start Test.
The test will now run and you will see how your campaign looks across multiple inboxes of popular email clients.
Just click on one the images to see a larger preview.
It is from here you can see what works well and what could be improved. To make sure your email campaign comes across great in any email client.