Re: Re: hotmail.com live.com admin needed

[Michiel Klaver <michiel () klaver it>]

As mentioned before, check the mail-logs at your webserver, you'll find this
"authentication required" message logged there as response to the hotmail
servers trying to relay mail to that webserver.


At 23-10-2012 14:49, Suresh Ramasubramanian wrote:
> "authentication required" is a bizzarre error to return.
>
> Does it go away if you actually turn off graylisting for hotmail?
>
> On Tuesday, October 23, 2012, Carlos M. Perez wrote:
>
> > Mike,
> >
> > I think this is exactly what is going on.  The domains that are having
> > issues have greylisting on with the spam filtering service and are
> > hosted on a farm of hosting servers.  We have blocked port 25 on the
> > main hosting IP of the web server, and moved the built in mail server to
> > listen on another IP.  This appears to be working, or at least has been
> > for almost 12 hours.
> >
> > The real question is why is hotmail/live the only system that apparently
> > does this; which seems to be in contradiction to RFC, and how everyone
> > else does it.  The one thing that MS chooses to be different with...
> >
> > Thanks,
> >
> > Carlos M. Perez
> > Runcentral, LLC
> >
> > On 10/23/2012 4:28 AM, Michiel Klaver wrote:
> > > Carlos,
> > >
> > > check the mail logs of your web-server, your domain might have a primary
> > > A-record pointing to something different than MX-records. When the MX
> > > servers do something like greylisting and bounce with a temp-code (4xx)
> > > hotmail servers will try alternative records (like @ IN A) and might
> > find a
> > > listening mail-daemon at your webserver.
> > >
> > >
> > > At 23-10-2012 00:16, Carlos M. Perez wrote:
> > > > Hi,
> > > >
> > > > We're trying to resolve some delivery issues reported by hotmail users.
> > > > Started happening a few weeks ago.  Getting immediate NDRs, and the
> > > > server that is supposed to receive the email has no records of
> > > > attempts.  The messages also don't match what the receiving server
> > > > should be sending.  The server(s) listed in the MX should receive all
> > > > email without authentication, since it's a mail filtering service
> > (Maxmail)
> > > > =
> > > > Reporting-MTA: dns;snt0-omc3-s27.snt0.hotmail.com
> > > > Received-From-MTA: dns;SNT133-W53
> > > > Arrival-Date: Mon, 22 Oct 2012 14:09:49 -0700
> > > >
> > > > Final-Recipient: rfc822;administrator () xxxx com <javascript:;>
> > > > Action: failed
> > > > Status: 5.5.0
> > > > Diagnostic-Code: smtp;550 authentication required
> > > > =
> > > >
> > > > Kindly contact me off-list.
> > > >
> > > > Thanks,