Modificación: Macro para enviar correos HTML masivos desde Word, con Outlook y datos adjuntos.

Encontré la macro que pondré a continuación y funciona muy bien. El único inconveniente es que los correos masivos los envía en formato "texto" y yo necesito enviarlo en formato "HTML". Necesito que me ayuden a re programar dicha macro para que el mensaje que se envíe muestre el mensaje tal cual como se edita en Word (con una imagen como firma y todo) y no solo texto. Gracias.

Sub combina()
Dim Source As Document, Maillist As Document, TempDoc As Document
Dim Datarange As Range
Dim i As Long, j As Long
Set objEmail = CreateObject("CDO.Message")
objEmail.from = "correo fuente"
Dim bStarted As Boolean
Set oOutlookApp = CreateObject("Outlook.Application")
' Dim oItem As Outlook.MailItem
Dim mysubject As String, message As String, title As String
Set Source = ActiveDocument
' Check if Outlook is running. If it is not, start Outlook
On Error Resume Next
Set oOutlookApp = GetObject(, "Outlook.Application")
If Err <> 0 Then
Set oOutlookApp = CreateObject("Outlook.Application")
bStarted = True
End If
' Open the catalog mailmerge document
With Dialogs(wdDialogFileOpen)
.Show
End With
Set Maillist = ActiveDocument
' Show an input box asking the user for the subject to be inserted into the email messages
message = "Escribe el asunto que llevarán todos los emails" ' Set prompt.
title = " Email Subject Input" ' Set title.
' Display message, title
mysubject = InputBox(message, title)
' Iterate through the Sections of the Source document and the rows of the catalog mailmerge document,
' extracting the information to be included in each email.
For j = 1 To Source.Sections.Count - 1
Set oItem = oOutlookApp.CreateItem(olMailItem)
With oItem
.Subject = mysubject
.Body = Source.Sections(j).Range.txt
Set Datarange = Maillist.Tables(1).Cell(j, 1).Range
Datarange.End = Datarange.End - 1
.To = Datarange
For i = 2 To Maillist.Tables(1).Columns.Count
Set Datarange = Maillist.Tables(1).Cell(j, i).Range
Datarange.End = Datarange.End - 1
.Attachments.Add Trim(Datarange.Text), olByValue, 1
Next i
.Send
End With
Set oItem = Nothing
Next j
Maillist.Close wdDoNotSaveChanges
' Close Outlook if it was started by this macro.
If bStarted Then
oOutlookApp.Quit
End If
MsgBox Source.Sections.Count - 1 & " messages have been sent."
'Clean up
Set oOutlookApp = Nothing
End Sub