On Sep 13, 2014, at 7:59 PM, Wietse Venema <wie...@porcupine.org> wrote:
> Philip Prindeville: >> Who says anything about mail servers? What if it's an MUA doing >> this? > > If the MUA connects to the MX service (port25) then it is an issue. > > If the MUA connects to port 587, then the server should not block > HELO, and instead it should require that the client authenticates. > > Wietse Yes, in an ideal world. We do that here, but not everyone does. -Philip
