Office 365 Shared Tenant - Email Send Limits


What are the email sending limits for students and alumni?


Sending limits for Students and Alumni email accounts in the Office 365 Shared Tenant:

  • 100 external (i.e., out-of-tenant) e-mails sent within any 1 hour period
  • 500 internal (i.e. inside-of-tenant) e-mails sent within any 1 hour period
  • 1500 total e-mails sent within any 24 hour period 



The purpose behind reducing sending limits is to help limit the ability of compromised accounts to inflict harm to other user accounts.  It will additionally reduce necessary cleanup time and efforts after a phishing attack has occurred.


Article ID: 126
Thu 2/10/22 9:11 AM
Tue 3/22/22 9:53 AM