Maximum number of Blocked Senders addresses in Outlook on the web

In Outlook on the web, the maximum number of addresses allowed in the Blocked Senders list is 1,024. (Outlook on the web for Indiana University uses Exchange Online.) You can add Blocked Sender addresses using the Manage Junk E-mail Lists option. If you exceed the size limit, you will receive the message:

An error occurred processing your Junk E-mail list. You are over the size limit allowed at the server. Contact your server administrator.

Outlook on the web has the same functionality across major browsers in most cases. For help using Outlook on the web, in your Inbox, select ? (question mark) in the top right.

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Last modified on 2023-09-29 13:14:05.