MSFT reverse IP failure?

Mon Feb 26 23:25:59 UTC 2018

Ken,

A little difficult to say what this without knowing what 13.67.59.89 actually is.   If this is an Azure deployment, ReverseFqdn needs to be populated on the Public IP address resource.  Please take a look here https://docs.microsoft.com/en-us/azure/dns/dns-reverse-dns-for-azure-services

Thanks,
Christian

-----Original Message-----
From: NANOG <nanog-bounces at nanog.org> On Behalf Of Ken Chase
Sent: Monday, February 26, 2018 1:31 PM
To: nanog at nanog.org
Subject: Re: MSFT reverse IP failure?

Having a client doing a test from the MSFT exchange tools site, which is failing.

NOQUEUE: reject: RCPT from unknown[13.67.59.89]: 450 4.7.1 Client host rejected: cannot find your reverse hostname, [13.67.59.89];

NetRange:       13.64.0.0 - 13.107.255.255
CIDR:           13.96.0.0/13, 13.104.0.0/14, 13.64.0.0/11
NetName:        MSFT

A bit of an oversight?

/kc
-- 
Ken Chase - math at sizone.org Guelph Canada