admin needed

Alex Brooks askoorb+nanog at
Wed Oct 24 19:44:30 UTC 2012


On Mon, Oct 22, 2012 at 11:16 PM, Carlos M. Perez <cperez at> wrote:
> Hi,
> We're trying to resolve some delivery issues reported by hotmail users.
> Started happening a few weeks ago.
> ===
> Reporting-MTA: dns;
> Received-From-MTA: dns;SNT133-W53
> Arrival-Date: Mon, 22 Oct 2012 14:09:49 -0700
> Final-Recipient: rfc822;administrator at
> 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 and, if
you are following the policy on that page and have a correctly
configured server, filled in the postmaster contact form at ?

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."


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