There are several methods to conduct user testing in email marketing:
A/B Testing: Create two or more versions of an email and send them to different segments of your audience. Analyze the performance metrics to determine which version is more effective. Usability Testing: Ask a small group of users to interact with your email and provide feedback. This can help identify usability issues that might not be apparent through analytics alone. Feedback Surveys: Send out surveys to your subscribers asking for their opinions on your emails. This can provide qualitative data that complements the quantitative data from A/B testing.