Mark Emails as Spam in Windows Mail Using Native Features
Follow these steps to move a single message to the Junk folder:
- Navigate to the folder where the massage is located.
- Right-click the message.
- Select the Mark as Junk option.


If the message you want to junk is already opened, then you can simply click the three horizontal dots in the top-right corner and choose the Mark as Junk option.
To junk multiple messages at the same time, you can hold down the CTRL button and click on every message you want to select. Then, right-click any of the selected messages and select the Mark as Junk option.
💡 Note: We’ve also written a step-by-step guide on how to mark a message as spam in the Outlook desktop app on Windows.
By moving messages to the Junk folder, you inform the spam filter for Windows Mail that you want to prevent the same messages from reaching your inbox in the future. Unfortunately, the Windows Mail junk filter isn’t as reliable as it should be, and there are reports of users receiving the same spam messages over and over again despite already reporting them more than once.
Outlook users solve the same problem by creating email filters, also referred to as inbox rules, but the Mail app doesn’t support them because it only basic features like receiving and sending emails.
Another issue is that moving all messages from multiple senders to the junk folder to update the Windows Mail spam filter can take a lot of time and effort because there’s no convenient way to select them.
For these and other reasons, the users of the Mail app should equip themselves with a third-party inbox cleaner like Clean Email. With its help, getting rid of unwanted messages and preventing them from ever again finding their way into your inbox becomes effortless.
Mark Messages as Spam in Windows Mail Using Clean Email
Clean Email provides a wealth of useful inbox and spam management features that Microsoft decided not to include in the Windows Mail application for the sake of keeping it simple enough for casual users to get started with in no time.
By default, Clean Email groups messages in the Inbox folder by sender (name and email), and you can also choose to group them by email address, sender domain, subject, date, recipients, and labels.
These extensive grouping options make it much easier to select each and every spam message you want to get rid of. You can even combine them with Clean Email’s Auto Clean feature to instantly create email rules based on them. Here’s how:
- Open your favorite web browser, go to https://app.clean.email, and sign in to the email account associated with the Windows Mail app.
- Open the Inbox folder.
- (Optional) Use the Group By dropdown menu to change how messages are grouped.
- Tap the icon next to each message group you want to select.
- You can now:
- Click the Spam button to mark all selected messages as spam.
- Or click the Create Rule button to create a new Auto Clean rule based on the selected messages. With this rule, you can choose to Mark as Spam all future (and existing) similar emails automatically.




As you can see, it takes just five simple steps for Clean Email to accomplish something that might take hours to do when relying only on the native features present in the Windows Mail. That’s why Clean Email is such a great way how to delete junk emails automatically.
💡 Tip: Email spam can be relentless, and it’s completely understandable if you want to take a break from it. Clean Email makes this easy with its Screener feature, which can be enabled to hold messages from new senders outside of your inbox until you decide which of them you want to keep.


FAQ
When does Windows Mail delete messages that are marked as spam?
Windows Mail automatically deleted messages that are marked as spam and moved to the Junk folder after 10 to 30 days.
What should I do if a messages ends up in the Junk folder by mistake?
If a message ends up in the Junk folder by mistake, you should move it to your Inbox or any other suitable folder to prevent it from becoming automatically deleted.
Does the Windows Mail app support email filters/rules?
No, the Windows Mail app doesn’t support email filters/rules. If you would like to take advantage of them to better organize your messages, then you can use a third-party email client like Clean Email.