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"From" Domain spoofing

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  • "From" Domain spoofing

    Hi,

    We have in our company a reoccurring issue which people get spam from random mailboxes with our domain prefix, for example: my domain is domain.com, We get spam from [email protected] (We don't have a "random" mailbox)

    We use Exchange 2010 and a simple spam filter called "Bullguard", which does it's job except for that issue above.

    I am sure there is a way to verify the sender IP and compare it to the domain,
    I Need help in applying it, any other solutions will be happily received as well

    Thank you!

  • #2
    Re: "From" Domain spoofing

    That is what SPF and SenderID are supposed to do. They need to be configured on whatever server accepts email from the internet though.
    Be careful setting it on your own domain as it can cause legitmate email to be blocked.
    Simon.
    --
    Simon Butler
    Exchange MVP

    Blog: http://blog.sembee.co.uk/
    More Exchange Content: http://exchange.sembee.info/
    Exchange Resources List: http://exbpa.com/
    In the UK? Hire me: http://www.sembee.co.uk/

    Sembee is a registered trademark, used here with permission.

    Comment


    • #3
      Re: "From" Domain spoofing

      Thanks for your reply Simon,
      Could you please direct me to an article describing how to validate the SenderID so we'll stop receiving those kind of e-mails?

      Thanks

      Comment


      • #4
        Re: "From" Domain spoofing

        Is Google broken today?

        http://www.google.co.uk/#hl=en&outpu...70a6be60442e5b

        This is not new technology, it has been around a long time and has been extensively written about.

        There are at least two pages about it on this very site!

        Simon.
        --
        Simon Butler
        Exchange MVP

        Blog: http://blog.sembee.co.uk/
        More Exchange Content: http://exchange.sembee.info/
        Exchange Resources List: http://exbpa.com/
        In the UK? Hire me: http://www.sembee.co.uk/

        Sembee is a registered trademark, used here with permission.

        Comment


        • #5
          Re: "From" Domain spoofing

          Microsoft have a Wizard on their site which will create an SPF record for you:

          I can't post a link yet but Google it.

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