Option Explicit
Sub Envoi_Mail()
Dim corps As String, lien As String
Dim OlApp As Object
Dim OlMail
    lien = "https://www.excel-downloads.com/forum/forum-excel.7/"
    corps = "Bonjour Monsieur," & vbLf & "Votre lien d'activation" & vbLf & vblf &  lien _
          & vbLf & vbLf & "Cordialement" & vbLf & vbLf & vblf &  "Votre WebMaster"
    Set OlApp = CreateObject("Outlook.Application")
    Set OlMail = OlApp.CreateItem(0)
    With OlMail
        .To = ""      'Envoyer à
        .Subject = ""         'Sujet
        .Body = corps           'Corps du message
        .Display      'Visualisation avant envois
        '.Send        'Envoi direct
    End With
    Set OlMail = Nothing
    Set OlApp = Nothing
End Sub