There are several ways to perform test compatibility:
Manual Testing: Send test emails to different email accounts (Gmail, Yahoo, Outlook) and check them on various devices. This method can be time-consuming but allows for hands-on verification. Email Testing Tools: Use specialized tools like Litmus, Email on Acid, or Mailtrap. These tools provide detailed insights into how your emails will render across different platforms and devices, often highlighting specific issues that need to be addressed. Responsive Design: Implement responsive design techniques in your email templates. Use media queries and flexible layouts to ensure that your emails adapt to different screen sizes.