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Configuration to send to AOL Yahoo

Posted on 2007-11-14
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Last Modified: 2012-06-27
I am getting email bounce backs from AOL, Yahoo, Hotmail.  What is the propery way to setup a mail server.
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Question by:dvella375
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by:maabu
ID: 20283897
What are you trying to do?  What do the error messages look like?  What kind of IP space are you trying to set a mail server up in?  Like off a consumer DSL or Cable modem connection?
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by:dvella375
ID: 20284081
I have a mail server setup at a colo (merak mail server). you are able to do a Reverse DNS on the domain (www.domain.com) and the sub-domain(mail.domain.com).  I am trying to send email to people with aol.com, yahoo.com, and hotmail.com (user@hotmail.com).  

The email get sent, but after a while they are being bounced back to the sender after being rejected by the companies servers.  I do not have a SPF record yet, and wonder if I need that setup.  An example of an error I got was from hotmail:

----- Transcript of session follows -----
.. while talking to mx1.hotmail.com
>>> MAIL From:<USER@DOMAIN.com>
<<< 550 DY-002 Mail rejected by Windows Live Hotmail for policy reasons. The likely cause is a compromised or virus infected server/personal computer. If you are not an email/network admin please contact your E-mail/Internet Service Provider for help. Email/n
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maabu earned 125 total points
ID: 20284187
That error message is ambiguous, but my first guess would be you are relay-blacklisted.  This means the IP address that you're using is identified as broadband DUL (dial-up-user) space, OR the IP has previously been the source of spam and the system is refusing to accept any more mail from that location.

I'd try sending to different ISPs and mailboxes and collect all the error messages and see if there's more information provided by another system.  You can also look up your IP address here to see if it's blacklisted:
  http://www.completewhois.com/rbl_lookup.htm

or here:
  http://www.mail-abuse.com/cgi-bin/lookup

If your IP address appears in any major relay blacklist, this could be your problem.  You may want to contact your colo and see if they can give you another IP address range that isn't blacklisted.  Depending upon who has you blacklisted, you might be able to contact the listing company and petition to change your blacklist status.
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