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Microsoft/Hotmail forgot to set reverse DNS pointers?

Subject: Microsoft/Hotmail forgot to set reverse DNS pointers?
From: michiel at klaver.it (Michiel Klaver)
Date: Wed, 21 Mar 2012 09:54:52 +0100

Today I received some notices about Hotmail users who couldn't send e-mail
messages to various receipients due to spamfilters blocking them at the
receiving mailservers. Seems like Microsoft/Hotmail staff forgot to set some
reverse DNS pointer records:

Diagnostic-Code: smtp;450 4.7.1 Client host rejected: cannot find your
reverse hostname, [157.55.1.150]

(Verified this using various public DNS servers, to exclude potential local
issues)

Anyone here who has proper contacts to give them the clue-bat?


--
Michiel Klaver
IT Professional

Follow-Ups:
- Microsoft/Hotmail forgot to set reverse DNS pointers?
  - From: jasongurtz at npumail.com (Jason Gurtz)
- Microsoft/Hotmail forgot to set reverse DNS pointers?
  - From: rspott at irongoat.net (D. Ryan Spott)
- Microsoft/Hotmail forgot to set reverse DNS pointers?
  - From: mjwise at kapu.net (Michael J Wise)

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