通常，当您回复或转发已设置类别的邮件时，已发送邮件上的类别会自动被移除。如果您希望在回复或转发时，依然在外发邮件上保留类别，本文将为您介绍一种解决方法。

使用 VBA 代码在回复或转发邮件时保留类别

使用 VBA 代码在回复或转发邮件时保留类别

1. 按住 ALT + F11 组合键，即可打开 Microsoft Visual Basic for Applications 窗口。

2. 在 Microsoft Visual Basic for Applications 窗口中，双击 Project 1(VbaProject.OTM) 窗格下的 ThisOutlookSession，进入编辑模式，然后将以下代码复制并粘贴到空白模块中。

VBA 代码：回复或转发邮件时保留类别：

Private WithEvents GExplorer As Outlook.Explorer
Private WithEvents GInspectors As Outlook.Inspectors
Private WithEvents GMailItem As Outlook.MailItem
Private GCategories As String
Private Sub Application_Startup()
    Dim xApp As Outlook.Application
    Set xApp = Outlook.Application
    Set GExplorer = xApp.ActiveExplorer
    Set GInspectors = xApp.Inspectors
End Sub
Private Sub GExplorer_SelectionChange()
    On Error Resume Next
    If TypeName(GExplorer.Selection.Item(1)) <> "MailItem" Then Exit Sub
    Set GMailItem = GExplorer.Selection.Item(1)
    GCategories = GMailItem.Categories
End Sub
Private Sub GInspectors_NewInspector(ByVal Inspector As Inspector)
    On Error Resume Next
    If TypeName(Inspector.CurrentItem) <> "MailItem" Then Exit Sub
   Set GMailItem = Inspector.CurrentItem
    GCategories = GMailItem.Categories
End Sub
Private Sub GMailItem_Forward(ByVal Forward As Object, Cancel As Boolean)
    Call GetCategories(Forward)
End Sub
Private Sub GMailItem_Reply(ByVal Response As Object, Cancel As Boolean)
    Call GetCategories(Response)
End Sub
Private Sub GMailItem_ReplyAll(ByVal Response As Object, Cancel As Boolean)
    Call GetCategories(Response)
End Sub
Private Sub GetCategories(ByVal NewMail As Object)
    If NewMail.Class <> olMail Then Exit Sub
    NewMail.Categories = GCategories
End Sub

3. 保存并关闭代码窗口后，关闭并重启 Outlook。现在，当您回复或转发带有类别的邮件时，类别将在外发邮件和已发送邮件中保留，见下方截图：