Office 365 email does have a limit to the number of email messages that can be sent at a single time. This is a prevention within the Office 365 service to limit and reduce spam.
Sending Limits for Office 365:
- 10,000 recipients per day
- 500 recipients per message
- 30 messages per minute
A potential work around to the 500 recipient limit per message is to do a mail merge. In a mail merge Office 365 sees each recipient as a separate message, however the 10,000 limit per day still applies. For instructions on how to do a mail merge, see the following Microsoft article.
Another potential work around for the 500 recipient limit per message is to create a distribution list from your contacts within the Outlook client. For instructions on how to create a distribution list, see the following Microsoft article.
For a full list of Office 365 email limitations please see the following Microsoft article.
Students who have an email address of @student.bridgew.edu have additional restrictions:
- Restricted from sending to external recipients 100 messages per hour
- Restricted from sending to internal recipients 200 messages per hour
- Maximum recipient limit of 500 per day