Hello, On Mon, Oct 22, 2012 at 11:16 PM, Carlos M. Perez <cpe...@runcentral.com> wrote: > Hi, > > We're trying to resolve some delivery issues reported by hotmail users. > Started happening a few weeks ago. <SNIP> > === > 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;administra...@xxxx.com > Action: failed > Status: 5.5.0 > Diagnostic-Code: smtp;550 authentication required > === >
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