If your picture is less than 96dpi, then the opposite happens. This is of course a severe and very visible quality loss. It even gets worse upon sending, Outlook will convert and compress (re-render) the images to 96dpi with the new dimensions permanently! This means that all the “detailed” picture information is lost and you’ll be sending an image of 96dpi which is 56px high.
This means that if you have a picture of 150dpi with a height of 88px, it will be displayed as an image of 56px high When inserting a picture, Outlook will rescale the image as if it was a 96dpi image. This issue usually happens when you are using a picture other than 96dpi. When creating newsletters or other e-mail design templates.Workaround 3: Resize signature images to their original dimensions.Workaround 2: Resize the image to its original dimensions.Workaround 1: Re-render the image at 96dpi.Solution: Option in Outlook for Microsoft 365.This guide contains several solutions and workarounds to this issues. The cause of this issue lies in the way handles image dimensions in combination with its dpi value. When inserting an image into the message body or using it in your signature, the image can unexpectedly change in size and/or become unsharp when sending even when it still looked sharp when composing.
