On Tue, 03 Feb 2009 13:55:04 -0800, Jeroen van Aart <[email protected]> wrote:
>
> > ASSP's 25 and 465 are sent to the MTA's 225. AUTH is optional here.
>
> Why would authorisation be optional on port 465? It should be mandatory
> and user submission on port 25 should be forbidden (or at the most
> allowed for the local network). Way back port 465 was meant to be used
> for smtps (a bad idea to begin with), nowadays (for the last decade or
> so I believe) that's not the case anymore and the port has been assigned
> to something completely different (first some Cisco TV thing, now URL
> Rendesvous Directory for SSM, see
> http://www.iana.org/assignments/port-numbers). So totally closing port
> 465 is the best thing, were it not for braindead clients.
>
You are correct that 465 is no longer officially SMTPS. Go ahead and
disable your 465.
However, for a while IANA did assign 465 to SMTPS and it was widely
used that way - as a direct equivalent to 25 but with SSL. For those
that still need this behavior, it is now available in ASSP.
-jr
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