How to auto add default text to the subject line in Outlook?

Author: Xiaoyang Last Modified: 2025-04-09

Is there a way to automatically add default text in a subject when you create a new email in Outlook? This article will talk about some useful ways for you to solve this job in Outlook.

Auto add default text to subject line with VBA code

Auto add default text to subject line with Kutools for Outlook

Auto add default text to subject line with VBA code

To add default text into the subject line automatically, please apply the following VBA code.

1. Hold down the "Alt" + "F11" keys to open the "Microsoft Visual Basic for Applications" window.

2. In the "Microsoft Visual Basic for Applications" window, double click "ThisOutlookSession" under "Project1 (VbaProject.OTM)" to open the module, and then copy and paste the following code into the blank module.

VBA code: Auto add default text to subject line

Public xFlag As Boolean
Private Sub Application_ItemSend(ByVal Item As Object, Cancel As Boolean)
Dim xText As String
On Error Resume Next
If xFlag = False Then
    xText = "Skyyang-"
    If InStr(Item.Subject, xText) = False Then
L1:     xText = InputBox("Input Subject", "Kutools for Outlook", xText)
        If xText = "" Then
            xFlag = False
            Cancel = True
            Exit Sub
        End If
        Item.Subject = xText & " " & Item.Subject
        xFlag = True
        Cancel = True
    End If
Else
    xFlag = False
    xText = "Skyyang-"
    If InStr(Item.Subject, xText) = False Then
      GoTo L1
    End If
End If
End Sub

Note: In this code, the text "Skyyang-" is the text that you want to add into the subject as default, please change it to your own.

3. Press "Alt" + "Q" to close the "Microsoft Visual Basic for Applications" window.

Now you need to create a new email to test the result.

4. Create a new email, enter the recipient in the "To" field, and type the subject into the "Subject" line. Then click the "Send" button, a prompt box will pop up asking if you want to add the default text into the subject line.

5. Click the "OK" button, and the default text will be added before the subject content automatically.

Auto add default text to subject line with Kutools for Outlook

Here is an easy method to help you auto add default text to the subject line. With "Kutools for Outlook" utility, you can quickly finish this task.

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1. Launch Outlook, and then click "Kutools" > "Options".

2. In the "Options" dialog box, click the "New" tab, then check "Add date into subject when creating new email" option, and enter the default text you want to display in the subject line automatically.

3. Click the "OK" button. Now when you create a new email, the specified default text will be inserted into the subject line automatically as shown below: