What is the maximum size for an e-mail message with attachments?

The maximum e-mail message size (including all attachments) that can be sent through the University e-mail systems is 35 MB (megabytes). This limit applies to both, Office 365 (faculty/staff e-mail system) and UWin Gmail (student e-mail system).

This limit is in place because e-mail systems are not optimised for sharing of large files. We have other tools and services in place for that. Sending large files through e-mail has a negative impact on the performance of the servers and network which affects all users.

If you need to share files that are large in size, e-mail is not the best tool for that. Please consider the following alternatives:

  • Share your file form your OneDrive
  • Use Files Drop Box (BFDB) tool

See "Related Articles" section on the right for more information.