Dec 3, 2025 · I tested this in Classic Outlook for Microsoft 365 MSO (Version 2510 Build 16.0.19328.20244) using dark mode in my environment, and the white square border did not appear, …

Dec 21, 2021 · White border lines on profile pic bug? Only appears on Outlook desktop app. In Teams or on the web portal it is fine. Thanks for any tips!

Outlook has many known rendering quirks, but none are quite as infuriating as the 1px horizontal line bug! We shed some light on the issue and give some helpful solutions.

Oct 23, 2025 · Find out what we know about why Outlook adds white lines to HTML emails and get six fixes that can help you solve the problem.

If you are experiencing an issue when viewing your email on Outlook and noticing the sudden appearance of an unexpected white line across your screen (shown below), read this article for some …

Nov 20, 2025 · This article will teach you how to add or change your Outlook profile image on the web and desktop app, and explain what to do if your new picture isn't showing or updating properly.

Thin horizontal lines sometimes appear in emails sent through Outlook. This is an Outlook rendering issue that affects classic and legacy versions of the email client. Try these fixes to reduce or …

Oct 3, 2022 · Describes an issue in which a user continues to see the previous Exchange Online profile photo even though you updated the user's photo by using that user's on-premises information.

Microsoft Outlook displays the image with a white box and black border when the recipient hasn’t downloaded the image into the email before forwarding it. You can download the images from the …

The bug causes one pixel-width, horizontal lines to appear, which are the same colour as the email background. Sometimes they stretch across the width, and sometimes they only affect certain …