Blocking MX query

Suresh Ramasubramanian ops.lists at
Wed Sep 5 00:34:53 UTC 2012

Who cares about NAT when you say smtp auth rather than allowing relay for
specific IPs?  And if you mean your smarthost is a linux box in your home,
it isn't impossible to get static IP broadband .. which is neither natted
nor port 25 filtered.
 On Sep 5, 2012 6:01 AM, "Masataka Ohta" <mohta at>

> Suresh Ramasubramanian wrote:
> > Have your desktop MTA configured to relay through your smarthost with
> smtp
> > auth?  Howtos for doing this on sendmail, qmail, postfix etc are over a
> > decade old now.
> What if, your home is also behind NAT or blocked port 25?
>                                                 Masataka Ohta

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