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  • #16
    Originally posted by StrobeTech View Post



    Office 365 should not be done via port 25, and the IPs should not be used to add to Office 365 to allow relaying either as this has caused C1 servers to be listed on the Microsoft High Risk Delivery Pool (HRDP), so emails sent via this platform will more than likely go into junk or be stopped by RBL checks as MS HDRP is listed everywhere.

    You should have a dedicated user account for ServiceDesk (SD), then configure it in O365 to not expire the password. Configure ServiceDesk to login and send via port 587 as per MS Tech articles.

    I warn you now that there is a problem with 365 sending which I'm working with support on currently.
    I have always used this way of doing it. It's even in M$ how to relay. I have tried the 587 with permissions and I cannot get it to send a test email. I have done spam tests on the emails sent out of the SD and the come back with a SCL of 1. I don't care now how I do it I just want it to work !! As we all do . So far the only way I have managed to get this working is by adding a relay connector.
    James Dyke.
    Director BCDR Solutions
    BCDR.Solutions
    Backup, Disaster Recovery & Business Continuity.

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    • #17
      Fully understand, but the issue is doing this is causing all C1 clients and additional apps to be listed as spammers.

      https://support.office.com/en-gb/art...8-c805d654b4c4

      If you look at the comparison at the bottom you will see your option can get the HRDP enabled for the C1 platform meaning your clients will not get quotes, SD emails and more.

      Option 1 is the best and would work if we can get the C1 servers off the HRDP list.
      Robin
      Director
      Strobe Technologies Ltd
      https://www.strobe-it.co.uk/

      Comment


      • #18
        Originally posted by StrobeTech View Post
        Fully understand, but the issue is doing this is causing all C1 clients and additional apps to be listed as spammers.

        https://support.office.com/en-gb/art...8-c805d654b4c4

        If you look at the comparison at the bottom you will see your option can get the HRDP enabled for the C1 platform meaning your clients will not get quotes, SD emails and more.

        Option 1 is the best and would work if we can get the C1 servers off the HRDP list.
        Intetesting. Where are you seeing the C1 ip's on the lists ?. All checks I have done report the ip's as clean
        James Dyke.
        Director BCDR Solutions
        BCDR.Solutions
        Backup, Disaster Recovery & Business Continuity.

        Comment


        • #19
          It's an internal list which MS do not advertise......
          But 90% of our clients are on Office 365; when we enable auth to use Office 365 for sending all emails go to junk .... O365 reports say this is a end user rule which digging deeper is HRDP kicking in.

          Swap them back to send via our spam filter (still using our domain) all service returns to normal.
          Robin
          Director
          Strobe Technologies Ltd
          https://www.strobe-it.co.uk/

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