Wietse Venema wrote:
>
> Let me say it in short sentences.
>
> Recent Postfix snapshots default to always trying ESMTP.
>
> This means that Postfix will send EHLO.
>
> Even when the 220 server greeting is totally f**d over by the PIX
> firewall.
>
> If the SMTP server accepts the EHLO command then Postfix will not
> enable the PIX workaround.

A server behind PIX will NOT accept EHLO command -- it will not even
see the EHLO, PIX changes EHLO into XXXX:

> > EHLO mjt.corpit.ru
> > 500 5.5.1 Command unrecognized: "XXXX mjt.corpit.ru"

> Is this clear?

Definitely.

> Wietse

Regards,
 Michael.
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