You open the Microsoft 365 Defender portal at. What do you need to know before you begin? To increase the effectiveness of spam filtering, you can create custom anti-spam policies with stricter settings that are applied to specific users or groups of users.
The basic elements of an anti-spam policy are: You can configure anti-spam policies in the Microsoft 365 Defender portal or in PowerShell (Exchange Online PowerShell for Microsoft 365 organizations with mailboxes in Exchange Online standalone EOP PowerShell for organizations without Exchange Online mailboxes). Custom policies always take precedence over the default policy, but you can change the priority (running order) of your custom policies. For greater granularity, you can also create custom anti-spam policies that apply to specific users, groups, or domains in your organization. For more information, see Anti-spam protection.Īdmins can view, edit, and configure (but not delete) the default anti-spam policy. EOP uses anti-spam policies (also known as spam filter policies or content filter policies) as part of your organization's overall defense against spam. In Microsoft 365 organizations with mailboxes in Exchange Online or standalone Exchange Online Protection (EOP) organizations without Exchange Online mailboxes, inbound email messages are automatically protected against spam by EOP.