Hello Specialist,

If you’ve ever experienced an issue where question marks appear instead of the correct content in your emails after sending (but everything looks fine in the Klaviyo preview), you're not alone. This issue can occur despite the email working perfectly during testing, and it can be frustrating as it impacts both the professional appearance of your emails and your revenue.

Do Not Panic, These Are Possible Causes and Solutions:

1. Character Encoding Issues:
   One common cause of question marks appearing in emails is character encoding mismatches. When the email is sent, certain characters (such as links, images, or product details) may not render properly if the encoding isn't set correctly. Ensuring UTF-8 encoding is used in your email templates can prevent this issue, as it supports most characters across different languages and symbols.

2. Dynamic vs. Static Product URLs:
   Klaviyo support often points to issues with changing product URLs when the problem occurs. If you're using dynamic product blocks or product URLs that change frequently, try using static URLs instead. This will ensure that the content renders correctly without the URL being altered unexpectedly. Static content is also less likely to cause issues when the email is sent out to your customers.

3. Absolute URLs:
   If you're using links or product URLs in your emails, always ensure they are absolute URLs (i.e., include the full URL, such as https://yourstore.com/product). Relative URLs might cause rendering issues, especially when the email client can't resolve the link properly.

4. Email Client-Specific Rendering Issues:
   Sometimes, the issue can be specific to certain email clients. Test your emails in a variety of clients (e.g., Gmail, Outlook, etc.) to check if the problem is widespread or confined to a specific platform. This might give you more insight into whether the issue is related to a particular email client’s rendering.

5. Clear Cache:
   If you've recently updated product URLs or images, clear your Klaviyo cache and re-test the campaign. This will ensure that the most current data is being used in your email.

By following these steps, you can avoid or resolve the issue of question marks appearing in your emails after sending.

If the issue persists, contacting Klaviyo support with specific details (like which content is showing the question marks) may help them troubleshoot further.

Hope this helps anyone experiencing the same problem.

Best Regards,

Amos Peace.