In this Brevo tutorial, I walk you through the exact step-by-step process I use to test and preview an email before I send it to my list. This is honestly one of the most important checks you can do, because it helps you confirm your email looks right across devices and inboxes before it reaches real subscribers. I start from the Brevo dashboard, go into Marketing → Campaigns, create a regular email campaign, and quickly set up the key sections: sender, recipients, subject line + preview text, and the email design. Once the campaign is ready, I show you where the real testing happens: the Preview and test button. Inside there, I go through the three tabs—Preview (desktop and mobile views), View in inbox (generate previews for clients like Gmail, Outlook, and Yahoo), and Send test email (so you can check it in a real inbox). My goal is to help you catch the small stuff before it becomes a big problem: spacing issues, broken links, images not loading, or formatting that looks different depending on the email client. If anything looks off, I simply jump back into the editor, make fixes, and repeat the test until everything looks perfect.