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office_365_spam [2018/04/09 09:56] (current)
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|+||====== Office 365 Spam ======|
|+||===== Outbound Spam Protection =====|
|+||There is built in outbound spam protection in Office 365 that you can't disable. If a mailbox is sending spam, it will be blocked from sending outbound email. They will get the following bounce:|
|+||[[https://gallery.technet.microsoft.com/office/550-518-Access-Denied-Bad-bf336c1b|Office 550, 5.1.8, Access Denied, Bad outbound sender]]|
|+||That article shows how to unblock the mailbox after you've fixed the problem.|