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Email to Hotmail (and other MS domains) rejected due to internal routing

    Question

  • We have a system that sends transnational email to customers.  We also have an SPF record that allows all of our outbound mail servers, and ends with ~all (softfail).  We also have proper DKIM and DMARC (with forensic reporting enabled).

    The issue is when we send emails to <someuser>@hotmail.com, we get DMARC failure/spam reports from staff [at] hotmail.com stating:

    This is an email abuse report for an email message received from IP 104.47.125.83 on Sun, 14 Feb 2016 07:02:27 -0800.

    The message below did not meet the sending domain's authentication policy.

    For more information about this format please see http://www.ietf.org/rfc/rfc5965.txt.

    The report included is as follows:

    Feedback-Type: auth-failure
    User-Agent: XMR/2.2
    Version: 1.0
    Original-Mail-From: <webmaster@<domain removed>.com>
    Arrival-Date: Sun, 14 Feb 2016 07:02:27 -0800
    Message-ID: <20160214150202.cf6b8ba0a831@www.<domain removed>.com>
    Authentication-Results: hotmail.com; spf=fail (sender IP is 104.47.125.83; identity alignment result is pass and alignment mode is relaxed) smtp.mailfrom=webmaster@<domain removed>.com; dkim=fail (identity alignment result is pass and alignment mode is relaxed) header.d=<domain removed>.com; x-hmca=fail header.id=webmaster@<domain removed>.com
    Source-IP: 104.47.125.83
    Auth-Failure: signature
    Reported-Domain: <domain removed>.com
    DKIM-Domain: <domain removed>.com
    DKIM-Identity: @<domain removed>.com
    DKIM-Selector: default

    My question and issue is, why is Microsoft resending our emails internally, changing the sent-from IP and failing the SPF check?

    Going to need someone from MS to address this as it seems to be an internal thing..

    Please see: http://answers.microsoft.com/en-us/outlook_com/forum/oemail-osend/email-to-hotmail-and-other-ms-domains-rejected-due/34026f1a-9116-44cf-845e-66e5dcbc264e for more detail.

    • Moved by Richard MuellerMVP Thursday, September 8, 2016 9:44 PM Not a TechNet Wiki question
    Thursday, September 8, 2016 8:25 PM

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