Help sending email but removing signature via VBA

[molonlabe]

I have my primary email and then I can send from another (Alt email), but that alt email is not an account that is added to my outlook, but I can send/receive from it. Hope that makes sense. Since the alt email account is not added, then I can't set it to have a default signature. Therefore I use this code to open a template and change the sending from. Problem is that it still adds the default signature. Before I could alter the registry to stop this, but I can no longer access the registry. I need a way to open the template without adding my default signature. Can anyone help!?

' Opens Email Disclosure Template
Sub OpenEmailTemplate()
    Dim oAccount As Outlook.Account
    For Each oAccount In Application.Session.Accounts
        ' If oAccount = "testATtest.com" Then
            Set temp = Application.CreateItemFromTemplate("file path here")
            temp.SentOnBehalfOfName = "sendATtest.com"
            temp.Subject = "PERSONAL AND CONFIDENTIAL COMMUNICATION"
            temp.Display
        ' End If
    Next
    Set temp = Nothing
End Sub