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Exchange 2007 blocking mail from a domain from being received RRS feed

  • Question

  • Hi,

          I have a vendor who is trying to send to our domain.  All of the e-mail from their domain is being blocked.  We're running Server 2003, Exchange 2007, and Forefront.  Here is the error message they're receiving:
    Delivery Final Failure Notice

    Can not deliver the message you sent. Will not retry.

    Sender: <****@bn.com>

    The following addresses had delivery problems
    <****@******.org>    Reply from outbounds8.ga.obsmtp.com[64.18.7.12]: 550 5.7.1 Message rejected as spam by Content Filtering.

    I have added them to our IP Allow List Providers, but it's still being blocked.  We are using Spamhaus block lists, but their domain doesn't appear to be on it.  Any ideas?

    Thanks
    Monday, October 19, 2009 3:03 PM