Relevant Products: Exclaimer Cloud - Signatures for Office 365
You cannot send an email and receive the following error:
You received this error message because Office 365 has banned you from sending emails - your emails are considered to have excessive levels of outbound spam.
- To delist a user see Use the delist portal to remove yourself from the blocked senders list.
- To resolve a compromised user account, as an Administrator, see How to fix a compromised (hacked) Microsoft Office 365 account.
- To resolve a compromised user account, as a User, see How to determine whether your Office 365 account has been compromised.
- To configure Office 365 to send notifications when outbound spam mail is detected or if a user has been banned by Office 365: you need to update the Outbound Spam Preference settings, in the Exchange Online Admin Console. For more information, see Configure outbound spam filtering in EOP.