11/9/2023 0 Comments Defender firewall spam![]() Read-only access to policies: Membership in the Global Reader, Security Reader, or View-Only Organization Management role groups.Modify policies: Membership in the Organization Management or Security Administrator role groups.You need to be assigned permissions before you can do the procedures in this article. To connect to standalone EOP PowerShell, see Connect to Exchange Online Protection PowerShell. To connect to Exchange Online PowerShell, see Connect to Exchange Online PowerShell. To go directly to the Anti-spam policies page, use. You open the Microsoft 365 Defender portal at. What do you need to know before you begin? Messages from blocked sources in the IP Block List aren't available in message trace. For more information, see Create safe sender lists and Create blocked sender lists. The IP Allow List, safe list, and the IP Block List are one part of your overall strategy to allow or block email in your organization. For more information about how EOP uses connection filtering is part of your organization's overall anti-spam settings, see Anti-spam protection. This article describes how to configure the default connection filter policy in the Microsoft 365 Microsoft 365 Defender portal or in Exchange Online PowerShell. Spam filtering is skipped on incoming messages from the email servers on the safe list. You enable or disable the use of the safe list you can't configure the servers in the list. Microsoft identifies these trusted email sources from subscriptions to various third-party lists. Safe list: The safe list in the connection filter policy is a dynamic allow list that requires no customer configuration. For more information about how the IP Block List should fit into your overall blocked senders strategy, see Create block sender lists in EOP. The incoming messages are rejected, aren't marked as spam, and no other filtering occurs. IP Block List: Block all incoming messages from the specified source IP addresses or IP address ranges. For more information about how the IP Allow List should fit into your overall safe senders strategy, see Create safe sender lists in EOP. For other scenarios where spam filtering still occurs on messages from servers in the IP Allow List, see the Scenarios where messages from sources in the IP Allow List are still filtered section later in this article. All incoming messages are scanned for malware and high-confidence phishing. IP Allow List: Skip spam filtering for all incoming messages from the specified source IP addresses or IP address ranges. The key components of the default connection filter policy are: In Microsoft 365 organizations with Exchange Online mailboxes or standalone Exchange Online Protection (EOP) organizations without Exchange Online mailboxes, connection filtering and the default connection filter policy identify good or bad source email servers by IP addresses. Learn about who can sign up and trial terms here. Did you know you can try the features in Microsoft 365 Defender for Office 365 Plan 2 for free? Use the 90-day Defender for Office 365 trial at the Microsoft 365 Defender portal trials hub.
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