Excel sending duplicate emails through Outlook

I've scoured the web on this issue but have not been able to find a solution. There was a mention of it from a poster back in 2009 and he did not receive any replies. I've asked about this a year ago and nothing then either so hoping something new has come around since.

Basically what happens is that I will press the email button on the sheet, it does its thing and then the recipient receives 1-3 emails usually. It has gotten to the point no one wants to use it anymore due to customers constantly asking why we keep sending them multiple emails. I can't quite figure it out as even when I disable the auto send and stop at the email compose screen it only shows the recipient listed once and not multiple times.

This is the email code I am using.

Sub Email_Minutes()
    Sheets("Email").Visible = True
    Worksheets("Email").Select
    Call Compile
    Dim FileExtStr As String
    Dim FileFormatNum As Long
    Dim Sourcewb As Workbook
    Dim Destwb As Workbook
    Dim TempFilePath As String
    Dim TempFileName As String
    Dim OutApp As Object
    Dim OutMail As Object

    With Application
        .ScreenUpdating = False
        .EnableEvents = False
    End With

    Set Sourcewb = ActiveWorkbook

    ActiveSheet.Copy
    Set Destwb = ActiveWorkbook

    With Destwb
        If Val(Application.Version) < 12 Then
            FileExtStr = ".xls": FileFormatNum = -4143
        Else
            Select Case Sourcewb.FileFormat
            Case 51: FileExtStr = ".xlsx": FileFormatNum = 51
            Case 52:
                If .HasVBProject Then
                    FileExtStr = ".xlsm": FileFormatNum = 52
                Else
                    FileExtStr = ".xlsx": FileFormatNum = 51
                End If
            Case 56: FileExtStr = ".xls": FileFormatNum = 56
            Case Else: FileExtStr = ".xlsb": FileFormatNum = 50
            End Select
        End If
    End With
        With Destwb.Sheets(1).UsedRange
            .Cells.Copy
            .Cells.PasteSpecial xlPasteValues
            .Cells(1).Select
        End With
        Application.CutCopyMode = False

    TempFilePath = Environ$("temp") & "\"
    TempFileName = Range("I4").Value & " File"

    Set OutApp = CreateObject("Outlook.Application")
    Set OutMail = OutApp.CreateItem(0)

    With Destwb
        .SaveAs TempFilePath & TempFileName & FileExtStr, FileFormat:=FileFormatNum
        On Error Resume Next
        With OutMail
            .to = "[email protected]"
            .CC = ""
            .BCC = ""
            .Subject = Range("I4").Value & " Text"
            .Body = "Hello," & vbNewLine & vbNewLine & "more text"
            .Attachments.Add Destwb.FullName
            .Send
        End With
        On Error GoTo 0
        .Close savechanges:=False
    End With

    Kill TempFilePath & TempFileName & FileExtStr

    Set OutMail = Nothing
    Set OutApp = Nothing

    With Application
        .ScreenUpdating = True
        .EnableEvents = True
    End With
    
    Sheets("Email").Visible = False
    Sheets("Formulas").Visible = False
    Sheets("Minutes").Select
    
End Sub

Any ideas or suggestions?

Edit: I should make mention that we use Gmail for business as the mail server if that makes any difference.