Re: [anti-spam-wg] Semi-OT: XXXX SMTP command

Markus Stumpf wrote:

> From the structure of the command I'd guess it is some filter/firewall
> that maybe sees an EHLO, considers this a bad command and masks it with
> "XXXX".
> Anybody else seeing this or knows what fine piece of ^H^H^H^H^Hsoftware
> is doing this?

Almost surely a Cisco PIX with "fixup protocol smtp" active.