Here's a neutral and interesting summary of the text in one paragraph: To ensure that emails are sent correctly, users need to test their emails before sending them to subscribers. Mailchimp provides a step-by-step process for sending a test email, including creating an email campaign, clicking the "Send a Test Email" button, and inputting the recipient's email address. However, if the test email doesn't arrive, there are troubleshooting steps that can be taken, such as checking the spam folder, verifying the "From" email address, and ensuring domain authentication. Additionally, Mailchimp has an Inbox Preview feature that allows users to preview their emails on multiple browsers and devices at once, which is ideal for testing with a large audience. The feature is available on paid plans and provides 25 tokens per month, which can be purchased as needed.