Outlook: How to auto resend email if no response

Author: Sun Last Modified: 2025-04-14

When you send an email to your colleague or cooperative partner or someone and need a response urgently, you can set an auto resend email setting if the response has not arrived before a specified time.

Using Reminder and VBA to set auto resend if no response

Part 1: set a reminder to remind in a specified time

1. Right click on an email (from Sent Items folder) that you want to resend if no response, in the popping context menu, click "Follow Up" > "Add Reminder".

2. In the popping "Custom" dialog, keep the "Reminder" checkbox ticked, then in the below drop-down boxes, choose a date and time that you want the response arrived before, also you can directly type the date and time in the boxes. Click "OK".

Part 2: Insert a VBA to resend emails if no response in the specified time

3. Press "Alt" + "F11" keys to enable the "Microsoft Visual Basic for Applications" window.

4. Double click "ThisOutlookSession" in the "Project – Project1" pane to create a blank script, and copy and paste the below VBA code into the blank script.

VBA: Resend email if no response

Public WithEvents GInboxItems As Outlook.Items
'UpdatebyExtendoffice20220413
Private Sub Application_Startup()
  Dim xInboxFld As Folder
  Set xInboxFld = Application.Session.GetDefaultFolder(olFolderInbox)
  Set GInboxItems = xInboxFld.Items
End Sub

'Judge
Private Sub GInboxItems_ItemAdd(ByVal Item As Object)
  Dim xSentItems As Outlook.Items
  Dim xMail As MailItem
  Dim i As Long
  Dim xSubject As String
  Dim xItemSubject As String
  Dim xSendTime As String
  On Error Resume Next
  Set xSentItems = Application.Session.GetDefaultFolder(olFolderSentMail).Items
  If Item.Class <> olMail Then Exit Sub
  For i = xSentItems.Count To 1 Step -1
    If xSentItems.Item(i).Class = olMail Then
      Set xMail = xSentItems.Item(i)
      xSubject = LCase(xMail.Subject)
      xSendTime = xMail.SentOn
      xItemSubject = LCase(Item.Subject)
      If (xItemSubject = "re: " & xSubject) Or (InStr(xItemSubject, xSubject) > 0) Then
        If Item.SentOn > xSendTime Then
           With xMail
             .ClearTaskFlag
             .ReminderSet = False
             .Save
           End With
        End If
      End If
    End If
  Next i
End Sub

'Reminder
Private Sub Application_Reminder(ByVal Item As Object)
  Dim xPrompt As String
  Dim xResponse As Integer
  Dim xFollowUpMail As Outlook.MailItem
  Dim xRcp As Recipient
  On Error Resume Next
  'Resend
  If (Item.Class <> olMail) Then Exit Sub
  xPrompt = "You haven't yet received the reply of " & Chr(34) & Item.Subject & Chr(34) & " within your expected time. Do you want to send a follow-up notification email?"
  xResponse = MsgBox(xPrompt, vbYesNo + vbQuestion, "Kutools for Outlook")
  If xResponse = vbNo Then Exit Sub
  Set xFollowUpMail = Application.CreateItem(olMailItem)
  With xFollowUpMail
    For Each xRcp In Item.Recipients
      .Recipients.Add (xRcp.Address)
    Next
    .Recipients.ResolveAll
    .Subject = "Follow Up: " & Chr(34) & Item.Subject & Chr(34)
    .Body = "Please respond to my email " & Chr(34) & Item.Subject & Chr(34) & " as soon as possible"
    .Attachments.Add Item
    .Display
  End With
End Sub

5. Save the code, then go back to the main interface, click "File" > "Options" and in the "Outlook Options" window, click "Trust Center" in the left pane, and click "Trust Center Settings" to enable the "Trust Center" window. Click "Macro Settings" and make sure that the "Enable all macros (not recommended; potentially dangerous code can run)" option is selected in the right section. Click "OK" > "OK".

6. Now if the sent email which has been set with a reminder receives no response when the specified time arrives, a popping dialog pops out to remind you whether to resend an email to make a notification.