In an email template with rows of stacked images, the tops of the images were getting cut off in Outlook 2013, Outlook 2013 120DPI, Outlook 2019, and Windows 10 mail. The images were dynamically-generated, therefore the containing cells included the following code to remove any whitespace when the images were collapsed:
<td align="center" style="mso-line-height-rule: at-least;
font-size: 0; line-height: 0;">
font-size: 0; line-height: 0;">
The fix was to add “px” to “line-height: 0;”.