hotmail.com live.com admin needed
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 Action: failed Status: 5.5.0 Diagnostic-Code: smtp;550 authentication required === Kindly contact me off-list. Thanks, -- Carlos M. Perez Runcentral, LLC
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:
Falling back to A when there is an MX (especially after receiving any kind of SMTP response from the MX) is an RFC violation by the way (rfc 5321 section 5.1) Even then - this doesn't appear to be the case. The bounce below was generated entirely within Hotmail. From SNT133-WS53 (a hotmail webserver) to snt-omc3-s27.snt0.hotmail.com - which I believe is part of their outbound mail farm. That's where the bounce was generated. "Requires authentication" might be because whatever domain is being sent to was originally hosted on hotmail, and set to require authentication to relay out through hotmail's servers. --srs On Tuesday, October 23, 2012, Michiel Klaver wrote:
-- --srs (iPad)
Suresh, The affected domains have never been on hotmail, etc. We've actually held this domain/hosting for the past 14+ years on this particular domain. Yes, there is an RFC violation, and it's apparently due to the greylisting feature from the spam filtering. Carlos M. Perez Runcentral, LLC On 10/23/2012 4:37 AM, Suresh Ramasubramanian 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:
Suresh Ramasubramanian <ops.lists@gmail.com> wrote:
"authentication required" is a bizzarre error to return.
It's fairly normal error from an Exchange server when the client is trying to relay to a domain that the server doesn't host and when the server doesn't allow the client to relay. Sounds like an internal misconfiguration in this case. Tony. -- f.anthony.n.finch <dot@dotat.at> http://dotat.at/ Forties, Cromarty: East, veering southeast, 4 or 5, occasionally 6 at first. Rough, becoming slight or moderate. Showers, rain at first. Moderate or good, occasionally poor at first.
Hello, On Mon, Oct 22, 2012 at 11:16 PM, Carlos M. Perez <cperez@runcentral.com> wrote:
Just to be sure, have you checked the error code you are receiving against the list at https://blu002.mail.live.com/mail/troubleshooting.aspx#Codes and, if you are following the policy on that page and have a correctly configured server, filled in the postmaster contact form at https://support.msn.com/eform.aspx?productKey=edfsmsbl&ct=eformts ? As the site says "If automation can determine [the IP range] to be eligible, the IPs may be mitigated. If not, the response will provide information about the status of the IPs and a link to report this to our Deliverability Support Staff who can than further investigate your issue. This team is available 24 x 7." Alex
participants (5)
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Alex Brooks
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Carlos M. Perez
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Michiel Klaver
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Suresh Ramasubramanian
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Tony Finch