How to prevent Outlook from sending an email with a blank Subject line

1.Open your outlook

2.Press Alt+F11 or Tools àMacro àVisual Basic Editor. This opens the Visual Basic editor

3.On the Left Pane, one can see "Microsoft Outlook Objects", expand this. Now one can see the "ThisOutLookSession".

4.Click on "ThisOutLookSession".

5.Copy and Paste the following code in the right pane.

Private Sub Application_ItemSend(ByVal Item As Object, Cancel As Boolean)

 Dim strSubject As String

 strSubject = Item.Subject

 If Len(strSubject) = 0

 Then

     Prompt$ = "Subject is Empty. Are you sure you want to send the Mail?"

     If MsgBox(Prompt$, vbYesNo + vbQuestion + vbMsgBoxSetForeground, "Check for Subject") = vbNo 

       Then

        Cancel = True

     End If

 End If

End Sub

6.Save this and Now close the VB Code editor.

7.In Outlook Go to Tools > Macros > Security > In the Security Level Tab > Select the option MEDIUM > OK

8.Now Restart the Outlook, a dialog box pops up to Disable / Enable the macros; select as Enable Macros (this option will pops up when ever you restart outlook.

9.From now on , this macro will make sure you do not make the mistake of sending a mail without subject