There are several elements you should test in your autoresponder:
1. Subject Lines: Experiment with different subject lines to see which ones get higher open rates. 2. Content: Ensure the content of your emails is clear, concise, and engaging. 3. Links: Verify that all links are working and directing to the correct webpages. 4. Timing: Test the timing and frequency of your emails to find the optimal schedule for your audience. 5. Personalization: Check if the personalization features (like the recipient's name) are working correctly.