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Mail from another forest with the same SMTP namespace being tagged with SCL9 RRS feed

  • Question

  • Hello,

    As mentioned in the title, I have 2 forests, with a single domain in each. Domain  A runs Exchange 2010 Domain B runs Exchange 2016.

    Scenario:

    User in Domain A sends email to user in Domain B

    Both users have the same SMTP domain namespace, userindomainA@mydomain.com, userindomainB@mydomain.com

    Email is tagged by Exchange 2016 servers with a SCL of 9, mail is subsequently routed to Users Junk Mail folder.

    Scenario 2:

    User in Domain B sends email to user in Domain A

    Both users have the same SMTP domain namespace, userindomainB@mydomain.com, userindomainA@mydomain.com

    Email is tagged by Exchange 2010 servers with a SCL of -1, mail is subsequently routed to Users Inbox Folder.

    In Domain A or Exchange 2010 environment I have a HubTransport Rule that says, any email sent from "mydomain.com"  Set Spam Confidence Level to -1.

    In Domain B or Exchange 2016 environment I have the same Hub Transport Rule that says, any email sent from mydomain.com set Spam Confidence Level to "0"... -1 deprecated in 2016.

    Is this a bug? or am I missing something? Even tho my HT rule says mark with SCL of 0, it still has an SCL of 9 once it hits the users mailbox (junk folder).

    Wednesday, September 14, 2016 5:11 PM

Answers

All replies

  • Hi,

    First of all, using transport rule to prevent Spam message is not the proper method. And if domain A is authenticated with domain, such message will not be tagged with SCL of 9

    Have you configured DomainA as accepted domain in exchange 2016? And do you configure a federation trust between two forest?

    https://technet.microsoft.com/en-us/library/jj657734(v=exchg.150).aspx

    https://technet.microsoft.com/en-us/library/jj673036(v=exchg.150).aspx


    Regards,

    Lynn-Li

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    • Proposed as answer by Lynn-Li Wednesday, September 28, 2016 7:11 AM
    • Marked as answer by Lynn-Li Monday, October 10, 2016 1:02 AM
    Thursday, September 15, 2016 9:21 AM
  • Hi,

    how do you transfer mails from Domain A to Domain B?

    If you connect those e.g. with a Edge Server you can configure the Edge Connection Filtering Agent's "IP allow List" to accept the partner domain,... and this in addition skip spam checks,... this should provide better SCL :-)

    If there is a other connection type between the domains,... please let us know.

    Best regards, 

    Max

    Thursday, September 15, 2016 12:01 PM