Te anexo la macro completa para enviar correo y formatear el texto.
'***Macro Para enviar correos
Sub correo()
'Por.Dante Amor
'col = Range("H1").Column
Application.ScreenUpdating = False
For i = 2 To Range("B" & Rows.Count).End(xlUp).Row
Set dam = CreateObject("outlook.application").createitem(0)
dam.To = Range("B" & i) 'Destinatarios
dam.CC = Range("C" & i) 'Con copia
dam.Bcc = Range("D" & i) 'Con copia oculta
dam.Subject = Range("E" & i) '"Asunto"
dam.body = Range("F" & i) '"Cuerpo del mensaje"
'
'For j = col To Cells(i, Columns.Count).End(xlToLeft).Column
j = Range("H1").Column
Do While Cells(i, j) <> ""
archivo = Cells(i, j)
If Cells(i, j) <> "" Then dam.Attachments.Add archivo
j = j + 1
Loop
dam.display 'El correo se muestra
Application.Wait Now + TimeValue("00:00:01")
DoEvents
celdas = Array(26, 27, 28, 29)
For j = LBound(celdas) To UBound(celdas)
Cells(i, celdas(j)).Copy
negritas
Next
'Centrar
SendKeys "%fac", True
celdas = Array(30, 31)
For j = LBound(celdas) To UBound(celdas)
Cells(i, celdas(j)).Copy
sangria
Next
dam.send 'El correo se envía en automático
Set dam = Nothing
'dam.display 'El correo se muestra
Next
MsgBox "Correos enviados", vbInformation, "SALUDOS"
End Sub
Sub negritas()
'Por.Dante Amor
SendKeys "^{HOME}", True
DoEvents
'Para buscar 2007
SendKeys "%ffbu", True
DoEvents
SendKeys "^v", True
DoEvents
Application.Wait Now + TimeValue("00:00:01")
SendKeys "{ENTER}", True
DoEvents
SendKeys "{ESC}", True
DoEvents
'Para negritas 2007
SendKeys "%f1", True
DoEvents
End Sub
Sub sangria()
'Por.Dante Amor
SendKeys "^{HOME}", True
DoEvents
'Para buscar 2007
SendKeys "%ffbu", True
DoEvents
SendKeys "^v", True
DoEvents
Application.Wait Now + TimeValue("00:00:01")
SendKeys "{ENTER}", True
DoEvents
SendKeys "{ESC}", True
DoEvents
'Para sangría
SendKeys "{LEFT}", True
DoEvents
SendKeys "{TAB}", True
DoEvents
End Sub