hotmail.com live.com admin needed
ops.lists at gmail.com
Tue Oct 23 12:49:20 UTC 2012
"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:
> 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...
> 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
> >> =
> >> 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
> >> Action: failed
> >> Status: 5.5.0
> >> Diagnostic-Code: smtp;550 authentication required
> >> =
> >> Kindly contact me off-list.
> >> Thanks,
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