Try the following:
Private Declare Function ShellExecute Lib "shell32.dll" _
Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, _
ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, _
ByVal nShowCmd As Long) As Long
Sub SendMail()
Dim URL As String, Email As String
Email = "youremail@email.com"
URL = "mailto:" & Email & "?subject=" & "Insert Subject" & "&body=" & "Insert Buffers"
ShellExecute 0&, vbNullString, URL, vbNullString, vbNullString, vbNormalFocus
Application.Wait (Now + TimeValue("0:00:01"))
Application.SendKeys "%s"
End Sub
You can insert anything you want into the subject and body of the message (variables, cell values).