OUTLOOK - VBA Code to change SenderMail to another Mail

Question

I'm currently trying to change the sender's email address in VBA to my secondary email in Outlook. The sender should change if an attachment's name includes a specific "attachment_name". I've already tried using the Application_ItemSend event, but it didn't work as expected.

端子

即使我包括“停止”并逐步移动，它也从默认电子邮件地址发送电子邮件。它达到“帐户”定义为new_sender_email的地步，但仍从错误的地址发送 这是我的尝试：

私有sub Application_itemsend（byval item作为对象，取消为布尔值） Dim MailItem作为Outlook.mailitem 昏暗的依恋作为outlook.attachment dim smtpaddress作为字符串

If TypeName(Item) <> "MailItem" Then Exit Sub
Stop
Set mailItem = Item
smtpAddress = "new_sender_email"

For Each attachment In mailItem.Attachments
    If InStr(LCase(attachment.FileName), "rechnung") > 0 Then
        mailItem.SentOnBehalfOfName = smtpAddress
        

        If mailItem.SentOnBehalfOfName <> smtpAddress Then
            MsgBox "Error2", vbExclamation
            Cancel = True
        End If
        
        Exit For
    End If
Next attachment

Answer 1

您面临的问题是由于使用SentonBehalfofName属性，该属性是为您代表他人发送电子邮件（例如代表）的方案而设计的。相反，您需要使用SendusingAccount属性来指定应使用哪个电子邮件帐户发送电子邮件。

这里是校正的代码：

Private Sub Application_ItemSend(ByVal Item As Object, Cancel As Boolean)
    Dim mailItem As Outlook.MailItem
    Dim attachment As Outlook.Attachment
    Dim newSenderAccount As Outlook.Account
    Dim smtpAddress As String
    Dim account As Outlook.Account
    Dim accounts As Outlook.Accounts
    Dim found As Boolean

    ' Ensure it's a MailItem
    If TypeName(Item) <> "MailItem" Then Exit Sub
    
    Set mailItem = Item
    smtpAddress = "new_sender_email"  ' Define the new sender's email address
    found = False
    
    ' Get all accounts in Outlook
    Set accounts = Application.Session.Accounts
    
    ' Loop through accounts and find the one that matches the smtpAddress
    For Each account In accounts
        If account.SmtpAddress = smtpAddress Then
            Set newSenderAccount = account
            found = True
            Exit For
        End If
    Next account
    
    ' If the account is found, set the email to send using that account
    If found Then
        mailItem.SendUsingAccount = newSenderAccount
    Else
        MsgBox "Account not found.", vbExclamation
        Cancel = True
    End If
    
    ' Check for attachments and apply condition based on the file name
    For Each attachment In mailItem.Attachments
        If InStr(LCase(attachment.FileName), "rechnung") > 0 Then
            ' Ensure the new sender is correctly applied
            If mailItem.SendUsingAccount Is newSenderAccount Then
                MsgBox "Email will be sent from " & newSenderAccount.DisplayName, vbInformation
            Else
                MsgBox "Error: Unable to change sender.", vbExclamation
                Cancel = True
            End If
            Exit For
        End If
    Next attachment
End Sub