The matter is that no Outlook desktop version supports the background images because of background-image style applied for pics displaying in stripe or container: this style is not supported by this email client.

To add the Outlook-friendly background image, go to Design - General settings tab and enable the corresponding function.

In this case, a hidden comment is applied in the program code, and it only works with Outlook and it allows users to see a background image.

Did this answer your question?