Hello, I need help. I have added custom fonts in my order confirmation email. In preview it’s looking perfect. But in test email, it’s showing different fonts. I checked and found that it’s something related to fallback font. I don’t know what it is. Please help me here. 
Topic summary
Custom fonts in a Shopify order confirmation email render correctly in the template preview but switch to different (fallback) fonts in test emails. The author suspects the issue is related to a fallback font and requests guidance.
- Context: Email template styling (CSS/HTML) for order confirmations; preview vs. test email discrepancy.
- Key term: “Fallback font” — a backup font used when the intended custom font isn’t available or supported by the email client.
- Ask: Explanation of fallback fonts and how to ensure the custom font is used in sent emails.
- Status: No solutions or steps provided yet; issue remains unresolved.