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Re: Hotmail blackholing certain IP ranges ?

  • From: Al Iverson
  • Date: Wed Apr 25 16:06:20 2007
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  • Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=Sk8UGleK4yRPWuyJRXDE+xAAdle3q0IQdxk3lW1dJFrnPhQDuaahm+mTMDOnKGJC65pAnvXf+Vf3NPoDDlawS3gb0yK5Za2JjQIQTKYjyiK8Pv1nLvGHsUBtTLpEvM4oYbRK9S+HTxqMK3MMnamAEUi8JccXQOJNxn1R/gw2Tgg=

On 4/25/07, Jeroen Wunnink <[email protected]> wrote: 

Does anyone have a clue why hotmail is appearantly blocking certain IP
ranges ?


Yeah, Hotmail's spam filtering recently got very aggressive. The short
version is that they are being pounded so hard by botnets and other
malicious spam/phish delivery vectors that IPs that have never sent
mail to Hotmail users start out with a negative reputation in
Hotmail's eyes.

Some info (admittedly, not too detailed, but it's all I could find handily):

http://tinyurl.com/38qutc
http://tinyurl.com/2meoqk
http://tinyurl.com/2ror2q

Short version of what can be done:
- Ensure any host sending mail has working forward/reverse DNS.
- Start signing mail with Sender ID.
- Contact Hotmail here: http://tinyurl.com/2byyts
- Wait and hope for a response.

It's impacting a lot of folks right now, from what I can see. Hotmail
has been very slow to address (or even respond) in some instances. I
theorize that this is because they are receiving a lot of contact
about this issue, but certainly don't know that for sure.

Regards,
Al Iverson
--
Al Iverson on Spam and Deliverabilty, see http://www.spamresource.com
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