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

The maximum size of an e-mail message on all University e-mail systems is 35 MB. Alternatives for sharing large files are OneDrive and Big File Drop Box.

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 is imposed by Microsoft and cannot be increased. E-mail service in general is 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 files from your OneDrive or inside Microsoft 365 Apps 
• Use Request Files feature of your OneDrive to have others send files to you.
• Use your departmental teams and private channels to share files internally or externally

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