Why do email signature images appear too large?
Email signature images appear oversized in Microsoft Outlook and Apple Mail when the image file has a high resolution setting, such as 300 DPI. Both email clients scale images based on their embedded DPI value rather than their pixel dimensions alone.
To display your MySignature email signature images at their intended size, match your image DPI setting to your email client requirements:
Microsoft Outlook: 96 DPI
Apple Mail: 72 DPI
To adjust the DPI setting of an image, use an image processing tool such as Adobe Photoshop before adding the image to your MySignature email signature.
How do I check the DPI of my email signature images on Windows?
To check the DPI of a supported image file on a Windows computer before uploading it to your MySignature email signature, view the file properties:
Locate the image file on your computer and right-click on the image.
Select Properties from the menu.
Open the Details tab.
Scroll to the Image section and check the DPI value.
Limitation: Checking DPI through Windows File Properties works only on certain image file types and does not work on PNG images. To check or change the DPI of a PNG image, or to check an image on a Mac, open the file in image processing software such as Adobe Photoshop.
How do I change the DPI of my email signature images in Adobe Photoshop?
To prevent your MySignature email signature images from scaling up in Microsoft Outlook or Apple Mail, adjust the image DPI setting in Adobe Photoshop:
Open your email signature image in Adobe Photoshop.
2. In the top menu bar, select Image, then select Image Size.
3. In the Image Size window, locate the Resolution field and enter the required DPI value for your email client:
Enter 96 for Microsoft Outlook.
Enter 72 for Apple Mail.
4. Verify that the resolution measurement unit next to the field is set to Pixels/Inch.
5. Verify that the Resample checkbox is selected and set to Automatic.
6. Save your updated image file and upload it to your MySignature email signature.
After you update the DPI setting and add the saved image to your MySignature email signature, the image will retain its intended size in Microsoft Outlook and Apple Mail. If your images continue to change size, contact the MySignature Support Team via live chat or email for assistance.