Introduction

This article describes the maximum attachment sizes for Exchange Online and Gmail email.

Explanation

Both VT Exchange Online and VT Gmail have their own limits for attached file sizes that change based on the address of both the sender and recipient. In this article, the address is either an Internal VT address (‘@vt.edu’) or an External address (not ‘@vt.edu’). Despite the limits listed below, it is recommended to keep all email attachments limited to 25 Megabytes (MB) or smaller per email. The best practice, however, is to share the document from a shared drive such as Google’s shared drives, Microsoft’s SharePoint, Microsoft’s OneDrive, or something similar. These limits cannot be adjusted.

VT Exchange Online attachment size limits

Direction	Limits (Megabytes)
Internal VT to Internal VT	150 MB
External to Internal VT	35 MB

 

VT Gmail attachment size limits

Direction	Limits (Megabytes)
Internal VT to Internal VT	25 MB
External to Internal VT	50 MB