How to delete all emails which have same subject in Outlook?

Author: Xiaoyang Last Modified: 2025-04-03

You may receive multiple emails which have the same subject from other senders, and these emails are useless for you. If you want to clean up your inbox and remove these unwanted emails, how do you delete them at once?

Delete all emails which have same subject with Rules
Delete all emails which have same subject with Search function
Delete all emails which have same subject with Kutools for Outlook

Delete all emails which have same subject with Rules

You can create a simple rule to delete all the emails that have the same subject. After deleting, you need to turn off or delete the rule you created. If you haven’t turned off the rule, when you receive these same subject messages next time, the emails will be moved to the "Deleted Items" folder automatically.

1. Select the email for which you want to delete all emails with the same subject.

2. Click "Home" > "Rules" > "Create Rule". See screenshot:

steps of deleting all emails which have same subject with Rules

3. In the "Create Rule" dialog box, check the "Subject contains" option. The subject text is added automatically. Then check "Move the item to folder", and click the "Select Folder" button to choose a folder in which to place the deleted emails. See screenshot:

4. Then click "OK", and check the "Run this rule now on messages already in the current folder" option in the prompt box.

5. Click "OK". All the emails that contain the same subject have been moved to the "Deleted Items" folder.

6. After removing the emails, go to "Manage Rules & Alerts" to turn off the rule you just created. You can select the rule item and click "Delete" to remove it or simply uncheck the rule. Then click "OK" to close the dialog box. See screenshots:

Delete all emails which have same subject with Search function

You can also delete emails containing the same subject by filtering them first with the Outlook "Search" function and then deleting them.

1. Go to the "Inbox" folder under your account where you want to delete the emails with the same subject.

2. Press the "Ctrl" + "E" keys simultaneously to activate the "Search Tools" and then click "Search" > "Subject". See screenshot:

3. The search criteria "subject:"keywords"" will be inserted into the "Instant Search" box automatically. Please replace the "keywords" with the specific subject text you want to use to filter emails. All emails with the same subject will be listed in the mailing list. See screenshot:

steps of deleting all emails which have same subject with Search functionwith Rules

4. Click one email item and press "Ctrl + A" to select all messages, then right-click to choose "Delete" from the context menu (or press the "Delete" key on the keyboard to delete them). See screenshot above:

Now all the filtered emails will be deleted from the specified mail folder in Outlook.

Delete all emails which have same subject with Kutools for Outlook

Here I will introduce a handy tool – "Kutools for Outlook". With this tool, you can quickly delete all emails that have the same subject with just a few clicks.

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If you have installed Kutools for Outlook, please follow the steps below:

1. Go to the email folder and select the email for which you want to delete all emails with the same subject.

2. Then click "Kutools" > "Relative Current > By Subject". See screenshot:

steps of deleting all emails which have same subject with Kutools for Outlook

3. In the "By Sender" dialog box, you can choose to delete "All" emails with the same subject directly, or delete all emails with the same subject within a specific "Date Range", and click the "Delete" button. See screenshot:

Notes:
(1) You can manually select emails for deleting in the "By Sender" dialog box;
(2) This tool is only applied to the currently selected folder, excluding its subfolders.