How to automatically flag emails based on specific attachment in outlook?

When receiving some emails with specific important attachment, you may need to flag them out, so that, you can quickly and easily find them for flow-up. This article, I will talk about an easy way to automatically flag the emails which attachments with specific names.

Automatically flag emails based on specific attachment with VBA code

Automatically flag emails based on specific attachment with VBA code

To auto flag the emails which contain the specific attachment, please apply the following VBA code:

1. Launch the Outlook, and then 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 from the Project1(VbaProject.OTM) pane to open a new mode, and then copy and paste the following code into the blank module.

VBA code: Auto flag the emails based on specific attachment:

Public WithEvents GMailItems As Outlook.Items
Private Sub Application_Startup()
    Set GMailItems = Outlook.Application.Session.GetDefaultFolder(olFolderInbox).Items
End Sub

Private Sub GMailItems_ItemAdd(ByVal Item As Object)
    If Item.Class <> olMail Then Exit Sub
    FlagEmail_SpecificAttachments Item
End Sub

Sub FlagEmail_SpecificAttachments(Mail As Outlook.MailItem)
    Dim xAttachment As Outlook.Attachment
    Dim xExt As String
    Dim xFileName As String
    If Mail.Attachments.Count = 0 Then Exit Sub
    For Each xAttachment In Mail.Attachments
        xExt = SplitPath(xAttachment.FileName, 2)
        xFileName = SplitPath(xAttachment.FileName, 1)
        Select Case xExt
            Case "txt", "xlsx", "docx", "pdf"  'Add the file extension as you need
                If InStr(LCase(xFileName), LCase("KTO")) > 0 Then 'Change the text of the attachment name
                    With Mail
                        .ReminderSet = True
                        .ReminderTime = Now + 1
                        .MarkAsTask olMarkTomorrow
                        .Save
                    End With
                End If
        End Select
    Next
End Sub

Public Function SplitPath(FullPath As String, ResultFlag As Integer) As String
Dim xSplitPos As Integer, xDotPos As Integer
xSplitPos = InStrRev(FullPath, "/")
xDotPos = InStrRev(FullPath, ".")
Select Case ResultFlag
    Case 0
        SplitPath = Left(FullPath, xSplitPos - 1)
    Case 1
        If xDotPos = 0 Then xDotPos = Len(FullPath) + 1
        SplitPath = Mid(FullPath, xSplitPos + 1, xDotPos - xSplitPos - 1)
    Case 2
        If xDotPos = 0 Then xDotPos = Len(FullPath)
        SplitPath = Mid(FullPath, xDotPos + 1)
    Case Else
    Err.Raise vbObjectError + 1, "SplitPath Function", "Invalid Parameter!"
End Select
End Function

Note: In the above code, you can change the file extension and attachment file name to your need.

3. Then save the code, and restart the Outlook to make the code take effect, now, when receiving the emails which attachments’ names contain the specified text, Outlook will auto flag this email for follow-up, see screenshot: