There are several methods to test emails on multiple devices:
Manual Testing: Send test emails to different devices and email clients that you have access to. This is a time-consuming but effective way to catch issues. Email Testing Tools: Use services like Litmus, Email on Acid, or Mailtrap that offer comprehensive testing features. These tools can simulate how your email will look across various devices and clients. Responsive Design: Implement responsive design principles in your email templates to ensure they adapt to different screen sizes automatically.