Message limits

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

Storage quota

  • Faculty, Staff and Students: Your mailbox size is 100 GB.
  • Alumni and Retirees: Your mailbox size is 50 GB.

Maximum number of messages sent per day

  • Faculty, Staff, Students and Retirees: You may send a maximum of 10,000 messages every 24 hours.
  • Alumni:
    • Restrict sending to external recipients (per hour): 50
    • Restrict sending to internal recipients (per hour): 50

Maximum number of recipients per message

  • Faculty, Staff, Students and Retirees: You may send to a maximum of 500 recipients.
  • Alumni: Maximum limit per day is 200 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.