Blocking MX query

Suresh Ramasubramanian ops.lists at
Wed Sep 5 03:45:12 UTC 2012

On Wed, Sep 5, 2012 at 9:10 AM, Masataka Ohta
<mohta at> wrote:
> While ISPs in the future should use not IPv6 but NAT with fixed
> IP addresses and sets of port numbers assigned to their customers,
> keeping the end to end transparency, it does not solve the
> problem of blocked port 25.
> Note that IPv6 do not solve the problem of blocked port 25, either.

So - now with ipv6 you're going to see "hi, my toto highly
computerized toilet is trying to make outbound port 25 connections to

Suresh Ramasubramanian (ops.lists at

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