How to setup anti spam exchange 2003




















You can use this setting when Exchange antispam filters are enabled in your organization, but you want to exempt messages that are sent to specific mailboxes from antispam filtering. You can configure this setting for mailboxes with a very low tolerance for false positives for example, sales or support mailboxes where you can't risk blocking any legitimate messages.

This example exempts messages that are sent to the mailbox named Customer Support from Exchange antispam filtering. To verify that you have successfully configured a mailbox to bypass antispam filtering, use the following procedures:. To find all mailboxes in your organization that are configured to bypass antispam filtering, run the following command:. To enable, disable, and configure the client-side Junk Email Filter settings that are available in Outlook, use Group Policy. This spam classification is separate from the SCL Junk Email threshold that's configured on the Exchange organization or on the mailbox.

In fact, Outlook ignores the SCL value that's set on a message by Exchange for all SCL values other than -1 , and uses its own criteria to determine whether the message is spam although the spam verdict from Exchange and Outlook might be the same. In November, , Microsoft stopped producing spam definition updates for the SmartScreen filters in Exchange and Outlook.

The existing SmartScreen spam definitions were left in place, but their effectiveness will likely degrade over time. The difference is whether the junk email rule on the server or the Junk Email Filter in the Outlook client moves the message to the Junk Email folder. Outlook and Outlook on the web both support the safelist collection. The safelist collection is saved in the Exchange mailbox, so changes to the safelist collection in Outlook appear in Outlook on the web, and vice-versa.

The safelist aggregation feature of the Content Filter agent shares these lists with the built-in Exchange antispam agents. Skip to main content. This browser is no longer supported.

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Any additional feedback? Tip Having problems? In this article. Move email from these senders or domains to my Junk Email folder. Don't trust email unless it comes from someone in my Safe Senders and Recipients list. Don't move email from these senders or domains to my Junk Email folder. If this threshold is enabled, the SCL value should be greater than all others. The SCL value should be less than the delete value, but greater than the quarantine or Junk Email folder values.

By default, this threshold is enabled on the Content Filter agent, and has the default value 7. Redirects the message to the spam quarantine mailbox.

For more information about the configuring the spam quarantine mailbox, see Configure a spam quarantine mailbox. If this threshold is enabled, the SCL value should be less than the delete or reject values, but greater than the Junk Email folder value. Delivers the message to the Junk Email folder in the mailbox. This action is controlled by the junk email rule that's enabled by default in every mailbox.

No You enable or disable the SCL threshold on the mailbox. You configure the SCL threshold value on the Exchange organization, or on the mailbox. The SCL value should be less than all others.

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You need to be assigned permissions in Exchange Online before you can do the procedures in this article:. For more information, see Permissions in Exchange Online. For our recommended settings for anti-spam policies, see EOP anti-spam policy settings. Creating a custom anti-spam policy in the Microsoft Defender portal creates the spam filter rule and the associated spam filter policy at the same time using the same name for both. On the Anti-spam policies page, click Create policy and then select Inbound from the drop down list.

The policy wizard opens. On the Name your policy page , configure these settings:. On the Users, groups, and domains page that appears, identify the internal recipients that the policy applies to recipient conditions :. Click in the appropriate box, start typing a value, and select the value that you want from the results.

Repeat this process as many times as necessary. To remove an existing value, click remove next to the value. For users or groups, you can use most identifiers name, display name, alias, email address, account name, etc.

Bulk email threshold : Specifies the bulk complaint level BCL of a message that triggers the specified action for the Bulk spam filtering verdict that you configure on the next page greater than the specified value, not greater than or equal to.

A higher value indicates the message is less desirable more likely to resemble spam. The default value is 7. This setting dramatically affects the results of a Bulk filtering verdict:. Contains specific languages : Click the box and select On or Off from the drop down list. If you turn it on, a box appears. Start typing the name of a language in the box. A filtered list of supported languages will appear. When you find the language that you're looking for, select it.

Repeat this step as many times as necessary. Start typing the name of a country in the box. A filtered list of supported countries will appear. When you find the country that you're looking for, select it. Message actions : Select or review the action to take on messages based on the following spam filtering verdicts:. You enter the X-header field name not the value later in the Add this X-header text box. For Spam and High confidence spam verdicts, the message is moved to the Junk Email folder.

The message is delivered to the mailbox and moved to the Junk email folder. Redirect message to email address : Sends the message to other recipients instead of the intended recipients. You specify the recipients later in the Redirect to this email address box. Delete message : Silently deletes the entire message, including all attachments. Quarantine message : Sends the message to quarantine instead of the intended recipients.

You specify how long the message should be held in quarantine later in the Quarantine box. You specify the quarantine policy that applies to quarantined messages for the spam filter verdict in the Select a policy box that appears. For more information, see Quarantine policies. For more information, see Configure junk email settings on Exchange Online mailboxes.

In hybrid environments where EOP protects on-premises Exchange mailboxes, you need to configure mail flow rules also known as transport rules in on-premises Exchange. These mail flow rules translate the EOP spam filtering verdict so the junk email rule in the mailbox can move the message to the Junk Email folder.

When you later edit the anti-spam policy or view the settings, the default quarantine policy name is shown. For more information about default quarantine policies that are used for the spam filter verdicts, see this table. Retain spam in quarantine for this many days : Specifies how long to keep the message in quarantine if you selected Quarantine message as the action for a spam filtering verdict.

After the time period expires, the message is deleted, and is not recoverable. A valid value is from 1 to 30 days. The default value is 15 days in the default anti-spam policy and in new anti-spam policies that you create in PowerShell. The default value is 30 days in new anti-spam policies that you create in the Microsoft Defender portal.

This setting also controls how long messages that were quarantined by anti-phishing policies are retained. Add this X-header text : This box is required and available only if you selected Add X-header as the action for a spam filtering verdict. The value you specify is the header field name that's added to the message header.



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