1. Built-in Preview Tools: Most [email marketing]( ) platforms, like [Mailchimp]( ) and [Constant Contact]( ), offer built-in preview tools that allow you to see how your email will look in different email clients and devices. 2. Send Test Emails: Sending test emails to yourself and others in your team can help you see how the email will look in a real inbox. This is particularly useful for checking the [subject line]( ) and preview text. 3. Third-party Tools: Services like Litmus and Email on Acid provide advanced preview features, including screenshots of your email in various email clients and on different devices. 4. Manual Testing: If you have access to multiple devices and email clients, you can manually check your email by sending test emails to different accounts.