New header from EOP: X-Microsoft-Antispam RRS feed

  • Question

  • I've noticed that we're receiving a new header in our e-mail coming through EOP with the text "X-Microsoft-Antispam." This appears to have started on May 31, 2014.  We also saw a drop in Spam e-mail from ~180,000 messages to 9,000 messages between May 30 and May 31.

    Were there changes to the EOP engine during that time, and how do we interpret the X-Microsoft-Antispam header values?

    Monday, June 9, 2014 8:32 PM


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