For instructions, see the The available actions for spam filtering verdicts are described in the following table.In standalone EOP environments where EOP protects on-premises Exchange mailboxes, you need to configure mail flow rules (also known as transport rules) in on-premises Exchange to translate the EOP spam filtering verdict so the junk email rule can move the message to the Junk Email folder.
For more information, see Never add accepted domains (domains that you own) or common domains (for example, microsoft.com or office.com) to the allowed domains list. In this cases, the anti-spam policy has an Allow and a Block list available to override the current verdict. Wildcards (*) aren't allowed.a. The same settings are available when you create a rule as described in the This example renames the existing spam filter rule named For detailed syntax and parameter information, see Enabling or disabling a spam filter rule in PowerShell enables or disables the whole anti-spam policy (the spam filter rule and the assigned spam filter policy). For greater granularity, you can also create custom anti-spam policies that apply to specific users, groups, or domains in your organization. In this scenario, you need to configure Enhanced Filtering for connectors (also known as Here are some steps that you can take to help prevent false positives:At Microsoft, we believe that the development of new technologies and self-regulation requires the support of effective government policy and legal frameworks. The goal for EOP is to offer a comprehensive and usable email service that helps detect and protect users from junk email, fraudulent email threats (phishing), and malware.As email use has grown, so has email abuse.
Simply put, it starts by containing and filtering junk email.The following anti-spam technologies are useful when you want to allow or block messages based on the message envelope (for example, the sender's domain or the source IP address of the message). That's why Microsoft continues to invest in anti-spam technologies. All existing rules that have a priority less than or equal to 2 are decreased by 1 (their priority numbers are increased by 1).To set the priority of a new rule when you create it, use the The default spam filter policy doesn't have a corresponding spam filter rule, and it always has the unmodifiable priority value When you use PowerShell to remove a spam filter policy, the corresponding spam filter rule isn't removed.To remove a spam filter policy in PowerShell, use this syntax:This example removes the spam filter policy named Marketing Department.For detailed syntax and parameter information, see When you use PowerShell to remove a spam filter rule, the corresponding spam filter policy isn't removed.To remove a spam filter rule in PowerShell, use this syntax:This example removes the spam filter rule named Marketing Department.For detailed syntax and parameter information, see These steps will only work if the email organization that you're sending the GTUBE message from doesn't scan for outbound spam. For details, see The maximum length is 255 characters, and the value can't contain spaces or colons (:).If you enter a value that contains spaces or colons (:), the value you enter is ignored, and the default X-header is added to the message (Think very carefully before you add domains here. Enter the domain. No two policies can have the same priority, and policy processing stops after the first policy is applied.For more information about the order of precedence and how multiple policies are evaluated and applied, see Custom anti-spam policies are displayed in the order they're processed (the first policy has the To change the priority of a policy, move the policy up or down in the list (you can't directly modify the The custom anti-spam policy with the highest priority has the value The custom anti-spam policy with the lowest priority has the value If you have three or more custom anti-spam policies, the policies between the highest and lowest priority have values When a spam filtering verdict quarantines a message, you can configure end-user spam notifications to let recipients know what happened to messages that were sent to them. You can't enable or disable the default anti-spam policy (it's always always applied to all recipients).To enable or disable a spam filter rule in PowerShell, use this syntax:This example disables the spam filter rule named Marketing Department.For detailed syntax and parameter information, see The highest priority value you can set on a rule is 0.
The filter lists are also used by the server to evaluate messages. The lowest value you can set depends on the number of rules. Messages continue through policy filtering, where messages are evaluated against custom mail flow rules (also known as transport rules) that you create … For more information, see the Every organization has a built-in anti-spam policy named Default that has these properties: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.You need to be assigned permissions before you can do the procedures in this topic:To add, modify, and delete anti-spam policies, you need to be a member of one of the following role groups:For read-only access to anti-spam policies, you need to be a member of one of the following role groups:For our recommended settings for anti-malware policies, see Creating a custom anti-spam policy in the Security & Compliance Center creates the spam filter rule and the associated spam filter policy at the same time using the same name for both.If you previously created anti-spam policies in the Exchange admin center (EAC) that contains these characters, you should rename the anti-spam policy in PowerShell.