Message limits

Learn about limits to storage, attachment size, number of recipients and more for UBmail (Exchange Online)

Storage quota

Your mailbox size is 100 GB.

Maximum number of messages sent per day

You may send a maximum of 10,000 messages every 24 hours.

Maximum number of recipients per message

You may send to a maximum of 500 recipients.

Email attachment size limits

Messages you send or receive (including attachments) may not exceed:  

  • Outlook, Outlook on the web, Outlook for Mac: 50 MB
  • Outlook for iOS and Android: 33 MB
  • Encrypted messages: 25 MB

See also

Still need help?

Contact the UBIT Help Center.