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Re: Paul's Mailfrom (Was: IETF SMTP Working Group Proposal at smtpng.org)

  • From: Martin
  • Date: Mon Aug 26 23:21:10 2002 
$author = "John Kristoff" ;
> 
> On Tue, Aug 27, 2002 at 12:14:46PM +1000, Martin wrote:
> > but surely an MTA derives it's usefulness by running on port 25. i don't
> > remember reading about where in the DNS MX RR you could specify what port
> > the MTA would be listening on...
> 
> Surely your not a spammer looking for tips are you?  :-)

hardly. just someone who has tried blocking traffic to dialup pools with DST
port 25 and forced relay on all outbound traffic with DST port 25.

it worked... for some values of worked. as most would know we broke 
smtp-auth for a small handful of people that were trying to use it.

as joe pointed out to me privately RFC 2782 specifies SRV RRs which could be
used to point an MX.SRV at a port other then 25. anyone got any examples of
MTAs or MUAs that implement said RFC?

marty

--
My Everest is not in Nepal, 
She's sleeping in the bedroom second right down the hall.
Ed Hiliary couldn't crack this nut, 
He'd be hiding in the lounge room with the rest of us.

"My Everest" - Lazy Susan