MS Outlook: Attachment Size Limit

Guide Topic

Attachment size limits for Microsoft Outlook.

TCC Default Limits

TCC default limits are currently set as follows:

  • Limit to Send: 35840KB
  • Limit to Receive: 36864KB

If you experience issues or receive errors when sending or receiving attachments, please Submit a Help Ticket. We can verify your current limits and, where possible, adjust them to meet your needs.

Information from Microsoft

Microsoft provides detailed guidance on this topic in their article: Message size and recipient limits in Exchange Server (external link, opens in new tab)​​​​​​. This includes information on:

  • Default attachment size limits for different Outlook and Exchange environments
  • Administrator-configurable limits and policies
  • How message size limits apply to emails with multiple attachments

  ⚠  Note: Microsoft regularly updates these limits and related policies. We recommend checking their official documentation for the most current information.

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