Outlook Email Attachment Size Limit

Sun, 19 Apr 2026 22:59:39 +0000

**Why Outlook Email Attachment Size Limit Is Top of Mind for US Professionals** In today’s fast-paced digital workplace, a hidden but powerful constraint shapes how users send and share files: the Outlook Email Attachment Size Limit. Across industries, teams are increasingly navigating this hurdle as remote collaboration and data sharing grow. With many relying on Outlook to send documents, reports, and proposals, understanding how large file sizes impact communication is becoming essential—yet often overlooked. The 25 MB threshold in Outlook remains a critical fact professionals must navigate to avoid delays and errors in professional exchange. Why is this limit drawing more attention now? The shift toward remote work and cloud-dependent workflows has amplified friction when sending large documents. While email providers have long enforced size limits, more businesses are actively reviewing controls to balance speed, security, and usability. Additionally, rising concerns over bandwidth costs, upload/download times, and compliance have spotlighted the impact of oversized attachments—not just on productivity, but on team efficiency and client trust. **How Does Outlook Email Attachment Size Limit Work?**