If you've encountered full-screen pop-up advertisements or spam notifications on your Android phone, we should be able to help you get rid of them. We'll show you how to pinpoint the source of the nefarious ads or spam so you can uninstall misbehaving apps. And if the notifications are coming from your web browser, we can help with that too.
Ad and Spam Blocking
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Firefox doesn't support Android notification channels, and it doesn't have a general list of all sites you have granted notification permissions to. As a result, blocking notifications from a specific site is done a little differently since there is no 'Site settings' button.
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. 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. For more information, see Anti-spam protection.
Admins can view, edit, and configure (but not delete) the default anti-spam policy. For greater granularity, you can also create custom anti-spam policies that apply to specific users, groups, or domains in your organization. Custom policies always take precedence over the default policy, but you can change the priority (running order) of your custom policies.
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).
In Exchange Online PowerShell or standalone EOP PowerShell, you manage the policy and the rule separately. For more information, see the Use Exchange Online PowerShell or standalone EOP PowerShell to configure anti-spam policies section later in this article.
You can't completely turn off spam filtering, but you can use a mail flow rule (also known as a transport rule) to bypass most spam filtering on incoming message (for example, if you route email through a third-party protection service or device before delivery to Microsoft 365). For more information, see Use mail flow rules to set the spam confidence level (SCL) in messages.
In the Microsoft 365 Defender portal at , go to Email & Collaboration > Policies & Rules > Threat policies > Anti-spam in the Policies section. To go directly to the Anti-spam policies page, use
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. A higher value indicates the message is less desirable (more likely to resemble spam). The default value is 7. For more information, see Bulk complaint level (BCL) in EOP and What's the difference between junk email and bulk email?.
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.1,2
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.3
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. For details, see Configure EOP to deliver spam to the Junk Email folder in hybrid environments.
3 A blank Select a policy value means the default quarantine policy for that particular verdict is used. 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 365 Defender portal.
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. The header field value is always This message appears to be spam.
Prepend subject line with this text: This box is required and available only if you selected Prepend subject line with text as the action for a spam filtering verdict. Enter the text to add to the beginning of the message's subject line.
Redirect to this email address: This box is required and available only if you selected the Redirect message to email address as the action for a spam filtering verdict. Enter the email address where you want to deliver the message. You can enter multiple values separated by semicolons (;).
Enable zero-hour auto purge (ZAP): ZAP detects and takes action on messages that have already been delivered to Exchange Online mailboxes. For more information, see Zero-hour auto purge - protection against spam and malware.
End-user spam notifications have been replaced by quarantine notifications in quarantine policies. Quarantine notifications contain information about quarantined messages for all supported protection features (not just anti-spam policy and anti-phishing policy verdicts). For more information, see Quarantine policies.
As of September 2022, if an allowed sender, domain, or subdomain is in an accepted domain in your organization, that sender, domain, or subdomain must pass email authentication checks in order to skip anti-spam filtering.
Never add common domains (for example, microsoft.com or office.com) to the allowed domains list. If these domains are allowed to bypass spam filtering, attackers can easily send messages that spoof these trusted domains into your organization.
Manually blocking domains by adding the domains to the blocked domains list isn't dangerous, but it can increase your administrative workload. For more information, see Create block sender lists in EOP.
In the policy details flyout that appears, select Edit in each section to modify the settings within the section. For more information about the settings, see the previous Use the Microsoft 365 Defender portal to create anti-spam policies section in this article.
By default, anti-spam policies are given a priority that's based on the order they were created in (newer policies are lower priority than older policies). A lower priority number indicates a higher priority for the policy (0 is the highest), and policies are processed in priority order (higher priority policies are processed before lower priority policies). No two policies can have the same priority, and policy processing stops after the first policy is applied.
When you use the Microsoft 365 Defender portal to remove a custom anti-spam policy, the spam filter rule and the corresponding spam filter policy are both deleted. You can't remove the default anti-spam policy.
On the Anti-spam policies page, select a policy with the Type value of Custom anti-spam policy from the list by clicking on the name. At the top of the policy details flyout that appears, click More actions > Delete policy.
In Exchange Online PowerShell or standalone EOP PowerShell, the difference between spam filter policies and spam filter rules is apparent. You manage spam filter policies by using the *-HostedContentFilterPolicy cmdlets, and you manage spam filter rules by using the *-HostedContentFilterRule cmdlets. 2ff7e9595c
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