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My ISP black listed my domain

how to prevent my domain from being hijacked by spammers

     
10:10 am on Feb 18, 2008 (gmt 0)

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My ISP has black listed e mail fr. my domain claiming it is being used by spammers. I've noted I'm getting lots of e mail using my domain from spammers.

Is there any program or setting one can use on the host's server to prevent this from happening?

7:49 am on Feb 19, 2008 (gmt 0)

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Look at setting up SPF records & DomainKeys to start.
8:11 pm on Feb 21, 2008 (gmt 0)

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Can you tell me a little more about these features, where I can find them & how to implement them.
8:07 am on Feb 22, 2008 (gmt 0)

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WebmasterWorld Administrator bill is a WebmasterWorld Top Contributor of All Time 10+ Year Member Top Contributors Of The Month

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Sure. Read up on these technologies here:

SPF

  • on WebmasterWorld [google.com]
  • http://www.openspf.org/
  • http://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/
  • http://en.wikipedia.org/wiki/Sender_Policy_Framework

    Domain Keys

  • on WebmasterWorld [google.com]
  • http://domainkeys.sourceforge.net/
  • http://en.wikipedia.org/wiki/DomainKeys
  • 8:53 am on Feb 22, 2008 (gmt 0)

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    Thanks Bill. I appreciate the help.
    5:28 pm on Feb 22, 2008 (gmt 0)

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    You should ask your ISP for more info. Generally, an ISP won't blacklist your domain just because a spammer is using forged headers - that is very common and most ISP's understand that is not your fault. You may have an open mail server on your domain that a spammer has compromised and is using to actually send spam.
    9:38 pm on Feb 22, 2008 (gmt 0)

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    Thanks, Stajer for that suggestion. At the time I spoke w. the ISP I didn't know which questions to ask. I'll go back & try to get them to be more specific.
    9:00 am on Mar 17, 2008 (gmt 0)

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    My ISP has confirmed that spammers are not forging my headers but rather actually gaining access to the mail server (through poorly written script?). So I don't think spf records are the answer (though I have implemented them for all 3 domains just in case). Somehow I've got to figure out how to close off the mail server to the spammers. Since the domains/sites are hosted on a friend's virtual server & he interacts w. the web host, that may be tough to do. Any thoughts would be appreciated.