If a user has enabled desktop DPI scaling, due to poor eyesight, or increasingly, as a default setting on new high DPI laptops, you may find that your emails fonts are much larger and tables appearing folded together.
Luckily there is a way to fix this problem in Outlook to make VML and images scale properly. You can place the following markup in the <head> of your emails HTML, and don’t forget to include the XML namespaces!
XML Namespaces:
HTML
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:v="urn:schemas-microsoft-com:vml"
xmlns:o="urn:schemas-microsoft-com:office:office">
Outlook Markup:
HTML
<!--[if gte mso 9]>
<xml>
<o:OfficeDocumentSettings>
<o:AllowPNG/>
<o:PixelsPerInch>96</o:PixelsPerInch>
</o:OfficeDocumentSettings>
</xml>
<![endif]-->
