UTmail+ email attachment size limit
Outlook for Windows and Outlook for Mac
- Overall message size limit for Outlook for Windows and Outlook for Mac is 150MB. This includes the email itself plus any attachments.
- File attachment size limit for Outlook for Windows and Outlook for Mac is 150MB.
Outlook Web Access (OWA)
- Overall message size limit for OWA is 112MB. This includes the email itself plus any attachments.
- File attachment size limit for OWA is 35MB per file.