DPI scaling is actually an accessibility setting in Windows, found in the control panel where display and screen resolution settings are found. Applies to: Outlook 365 (Win), Outlook 2019 (Win), Outlook 2016 (Win), Outlook 2013, Outlook 2010. If it’s set to anything else, you may experience blurry images. If you’re using the code generated from Backgrounds.cm, then you’ll want to update the type attribute on the v:fill element to frame instead of tile. For image files, you'll also see a small preview of the picture along with the name and size of the file. We’re having an issue with email rendering on Outlook 2013 (125% dpi) wherein the images stray from the set boundaries of the parent table. Note: For more information specific to reducing picture files, see the section Insert and resize pictures in the body of an email message. Instead, Hybrid uses
 with CSS display: inline-block;, width: 100%; and max-width for multi-column layouts, which will naturally stack one below the other when they no longer fit side by side. If your DPI settings are too high, you’ll likely end up with an enlarged image in your email signature. This quirk also applies to Outlook 2007, 2010 and 2013. When I was developing email templates earlier this year, I really wanted to correct any rendering issues that I could in Outlook with a higher DPI… especially when it’s not possible to know if subscribers are using a higher DPI setting, but I could see that they’re using Outlook. When we implement VML for background images, we’re already using CSS width and height. Thankfully, Hybrid emails are already more flexible and a bit more giving than other techniques for developing emails. If the picture looks too big (or too small), you can use the sizing handles on the picture to resize the image. You can overcome this by setting the wrapping style of the image to “Top and Bottom”. If your image is large, you'll see this message: Some recipients may not receive this message because of image attachments. If the picture attachment is too large, you can tell Outlook to resize the picture for you when you send the message. In this case it’s mso-cellspacing and mso-padding-alt. In the example below, we can see how without the code from Parts 1 and 2 that the VML background does not scale, and we can see the background colour behind it. I prefer to match the value of the CSS width in the MSO conditional comments to the max-width it is wrapping, in pixels, so that it’s consistent, easy math, and easy to update later on if needed. It should, as it is code ONLY for Outlook, and the DPI issue is also only with Outlook. The Send Pictures via E-mail dialog box appears. The following is a list of best practices to use when sending pictures and attachments: Post or publish large attachments    - If you're sending attachments or pictures to someone with whom you are willing to share a stored location in the cloud, or on your organization's network, you can include a link to that location in your e-mail message. Copy a sharing link from a cloud storage service. If you want to learn more about how Outlook resizes pixels in fonts and images, DPI Scaling in Outlook 2007–2013 by Michael Muscat is a great read. This happens because Microsoft Outlook and Apple Mail scale images using the DPI value. That would be 96! Click the inserted image to activate the Picture Tools, and then click the anchor at the bottom-right corner of the Size group on the Format tab. VML has become more and more popular recently, especially for background images, since the Word rendering engine in newer versions of Outlook doesn’t support CSS background images or even the HTML background attribute. Any messages received after a person's mailbox has reached its storage limit can sometimes be rejected. I have a very annoying issue with an HTML email I have designed and built when viewed in Outlook 2013. Lower resolution pictures have a smaller file size. The image size seems OK when creating the email, but once it is sent Outlook seems to be re-sizing the image, causing it to look blurry and quite a bit larger than it should. See screenshot: 4. Limit the size of your attachments    - This is a general guideline; for slower, connections (such as a mobile device) you should use a much smaller size, such as 250 kilobytes (KB). Devthought had a little CSS tip the other day that is definitely worth repeating. The amount of reduction will be minimal with some file formats that are already saved in a compressed format. However I have found, depending on how complex the structure is, that this can get complicated when you’re also working with CSS padding and more nesting. At the time, it wasn’t obvious to me that it has to do with the MSO conditional comments when you’re coding Hybrid. Select a file. If you want, change the subject information in the Subject box. If you want to change the height and width separately, clear the Lock aspect ratio check box before you change the required height or width in step 2. Category Howto & Style; Show more Show less. It’ll work in either place! Because whichever way you go, you will break the appearance for either the normal DPI audience or the higher DPI audience. Depending on the computer, there may even be more options than just 100%/125%/150%. Resize the large image before you print it. When we have the DPI setting on the computer set to 96, and the PPI in the code set to 96, the image displays as normal. When you are finished composing your e-mail message, click Send. There are several methods you can use to keep the size of your email messages and attachments small when sending these files. I can see animated Gifs in Outlook 00/03. In the Attachment Options pane, under Picture options, in the Select picture size drop-down list, click the size of the picture you want to include. The unfortunate news is, there isn’t really anything we can do about this without causing issues for one scaling factor or the other. So if we want to display an image at 300px by 300px, we would create it at 600px by 600px, but still use 300px in the code. Right-click on your Outlook shortcut, and select Properties. If you want, change or enter any information you want to include in the message body. This, however, will not shrink the total size of the email message you're sending. Those pixel values, even though it’s in CSS, does not get changed into points. To select multiple files, press and hold CTRL as you click each file. March 8, 2019 by Diane Poremsky 1 Comment. 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; 88px/150dpi * 96dpi = 56pxIt even gets worse; upon sending, Outlook will convert and compress (re-render) the images to 96dpi with the new dimensions permanently! A new Outlook message window appears with the attached picture. The quickest way to change the wrapping style of an image is to right click on it and choose; Wrap Text-> Top and Bottom The largest graphics file formats are those that are not saved in a compressed file format, such as .tif and .bmp (the default file format of Windows Paint). Important: Compressing a picture to reduce the size of the file changes the amount of detail retained in the source picture. To select multiple files, press and hold CTRL as you click each file. As you can see, the image bursts out of the width of its parent element. By default, Outlook wants all images to be at 96 DPI. With all of this scaling and images, you may be wondering about retina images. Despite have an identical horizontal resolution, images, text, and icons will be physically larger on the laptop so they can roughly match the same elements on the desktop screen. When an Outlook 2013-2016 user with display scaling above 100% receives that email and then subsequently forwards or replies to it, Outlook will "helpfully" resize the image, changing the underlying HTML code. Enter the recipient information in the To, Cc, and Bcc boxes. Create a new e-mail message in Outlook; On the Insert tab, in the Include group, click Attach File and select the picture file you want to attach. When changed into points, they become scalable like percentages. 1. Note: If you embed the picture in the body of the message by using the Picture command in the Illustrations group, the automatic picture resize feature is not available. › Resize images in an Outlook email. There is, however, a weird resizing issue with images on iOS on the iPhone (again, the Mail app). Tip: You can also drag and drop a picture from Windows Explorer. In your email message, select Attach File from the ribbon. ), unfortunately Outlook 2007 doesn’t treat DPI the same as newer versions when changing the PixelsPerInch value in the code to correct image scaling (Part 2 of our fixes). This scaling up is great for users, because it makes everything much easier to read. Thus, an image that is 100x100px gets scaled up to 175x175px (on a 175% scaled screen). Thanks. See the CSS and screenshot below. Windows allows you to create and open zip files without any additional software. Then increasing the PPI in the code to 120, the image actually shrinks! Another workaround that worked for other users using external monitor/s is to set one of the external screens as the main display, log off, and then log on. Step 4: Right click the inserted picture, and select the Size and Position (or Size in Outlook 2007) in the right-clicking menu. When you attach a picture as a file, the picture won't display directly in the body of the email message. In the end, our emails don’t look so great, and could even look broken. Please visit and support our forums. Go to the Compatibility tab. When inserting a picture, Outlook will rescale the image as if it was a 96dpi image. Based on these results, sticking to 96 PPI is probably the best bet. Note: You can also drag and drop a picture from Windows Explorer.The picture file will be attached to the e-mail message. Select the compression and resolution options and then select OK. For pictures that won't be printed, Web (150 ppi) is the most common resolution. We’re having an issue with email rendering on Outlook 2013 (125% dpi) wherein the images stray from the set boundaries of the parent table. On the Insert tab, in the Include group, click Attach File. Bottom line: Images in Outlook 2007 on higher scaling factors are broke and not fixable without breaking either the normal DPI users view or the higher scaling factor users view. Resized images will be a maximum of 1024x768 pixels. Use smaller original files    - The size of a photo taken by a mobile phone or a digital camera is typically large, even when saved in a compressed file format such as .jpg. Hybrid is a method of developing responsive emails without the reliance on media queries. Open Windows Explorer by clicking Start, and then double-clicking Computer. Our HTML width and height attributes need to become CSS width and height instead. We expect this since the DPI and PPI are both the same. I have no problems adding a repeating background image to the body/100% width containing table without VML. My 2" wide logo would show as 2.5" or 3" depending on the % selected. Before we dive into how to solve DPI scaling, let’s first understand why we see these issues with our emails in Outlook in the first place. It is best to remember what the filename of the image is. Does anyone know why this happens or how to correct it? This means that if you have a picture of 150dpi with a height off 88px, it will be displayed as an image of 56px high; 88px/150dpi * 96dpi = 56px. While this is a quick method of resizing images, you should know that it will only allow you to resize them to a resolution of 1024 x 768 pixels. Instead, an icon of the picture will appear under the message subject. Your mail server administrator or the organization providing your email service can tell you this. Outlook has an issue with the DPI scaling, wherein any resolution of 1920×1080 and above will distort the layout of your email. This creates a new zip file that contains the file or files you selected in step 2. The VML code in this method is a bit different, but retina images also work with it as well. For example, a Notepad .txt text file will reduce dramatically, while a .jpg image will not. Therefore, Outlook 2007 and Outlook 2010 do not have the Shrink to Fit functionality that is available in earlier Outlook versions. Right-click on the large image and save it to disk. You can change the visible size of the picture; for example, how much of the screen it takes up, without changing the file size or resolution of the picture. Something also to consider is that retina images also work with VML background images! If you’d like more precise options, you can click the “Custom scaling” link. Note: If you embed the picture in the message body — the picture appears in the message — by using the Picture command in the Illustrations group, the image attachment resize feature is not available. When it comes to DPI scaling, VML is a little bit different though. Most cloud storage solutions such as OneDrive, OneDrive for Business, Dropbox or Google Drive allow you to get a shareable link to your file. Compressing a picture maintains the height and width of the picture, but reduces the resolution. Below is a very simple two column example. Though we can target Outlook by version (2007, 2010, etc), there isn’t a way to target Outlook by DPI, as it’s a computer setting. Problem 3: Pixel Resizing. If you use cellspacing and cellpadding, you’ll need to have a CSS solution added as well. While email is a single, continuously scrolling page, Outlook renders portions of the email as though they are meant to be printed onto separate sheets of paper. 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