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    Unsolved O365 Outbound email issue

    IT Discussion
    o365 office 365 exchange online email cert certificate certificate authority
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    • J
      JasGot last edited by JasGot

      Take at look at the certs using this. The cert for your vendor, not you.

      https://www.checktls.com/TestReceiver

      See if it shows a hint.

      Like a problem with the cert or their root or intermediate cert. Or even, the wrong cert.

      JaredBusch 1 Reply Last reply Reply Quote 1
      • JaredBusch
        JaredBusch @JasGot last edited by

        @JasGot said in O365 Outbound email issue:

        Take at look at the certs using this. The cert for your vendor, not you.

        https://www.checktls.com/TestReceiver

        See if it shows a hint.

        Like a problem with the cert or their root or intermediate cert. Or even, the wrong cert.

        I had never heard of that site.. That is fucking awesome..

        And proves there is a self signed cert. but that does not explain why MS still cares..
        2bef4ccb-0e96-4cca-abdb-604fa6585e2e-image.png

        scottalanmiller J 2 Replies Last reply Reply Quote 0
        • Dashrender
          Dashrender last edited by

          61ad90e7-cc80-45f0-ac8c-94226bbe9e53-image.png

          This is why, MS killed TLS v1. I think v1.1 was also killed.

          JaredBusch 1 Reply Last reply Reply Quote 0
          • Dashrender
            Dashrender last edited by

            06b5b9af-a642-4634-baff-2479d5380532-image.png https://blogs.perficient.com/2019/07/24/office-365-is-retiring-tls-1-0-and-1-1-why-you-should-care/

            1 Reply Last reply Reply Quote 0
            • scottalanmiller
              scottalanmiller @JaredBusch last edited by

              @JaredBusch we use it a lot, I seem to do SO many cert tasks these days, Ugh.

              Dashrender 1 Reply Last reply Reply Quote 0
              • JaredBusch
                JaredBusch @Dashrender last edited by JaredBusch

                @Dashrender said in O365 Outbound email issue:

                61ad90e7-cc80-45f0-ac8c-94226bbe9e53-image.png

                This is why, MS killed TLS v1. I think v1.1 was also killed.

                That is not the problem. TLSv1 for SMTP works fine.

                Nothing that Microsoft has posted affects SMTP. it affects connectivity to Office 365 form your browsers and apps.

                1 Reply Last reply Reply Quote 0
                • Dashrender
                  Dashrender @scottalanmiller last edited by

                  @scottalanmiller said in O365 Outbound email issue:

                  @JaredBusch we use it a lot, I seem to do SO many cert tasks these days, Ugh.

                  can you add the cert tag to this post?

                  Or do we need a new thread with just that site in the OP to tag?

                  1 Reply Last reply Reply Quote 0
                  • J
                    JasGot @JaredBusch last edited by

                    @JaredBusch said in O365 Outbound email issue:

                    I had never heard of that site.. That is fucking awesome..

                    Glad you like it! It helps identify SO MANY issues.... 🙂

                    1 Reply Last reply Reply Quote 0
                    • JaredBusch
                      JaredBusch last edited by

                      For the record, even though I made the above connector and it failed to verify, I did save the connector. Apparently, that was enough as email is sending now.

                      Dashrender 1 Reply Last reply Reply Quote 1
                      • Dashrender
                        Dashrender @JaredBusch last edited by

                        @JaredBusch said in O365 Outbound email issue:

                        For the record, even though I made the above connector and it failed to verify, I did save the connector. Apparently, that was enough as email is sending now.

                        So which connector is solving this - the TLS regardless of cert condition, or the No-TLS

                        JaredBusch 1 Reply Last reply Reply Quote 0
                        • JaredBusch
                          JaredBusch @Dashrender last edited by

                          @Dashrender said in O365 Outbound email issue:

                          @JaredBusch said in O365 Outbound email issue:

                          For the record, even though I made the above connector and it failed to verify, I did save the connector. Apparently, that was enough as email is sending now.

                          So which connector is solving this - the TLS regardless of cert condition, or the No-TLS

                          I only left the TLS regardless of cert, so it has to be that one.

                          1 Reply Last reply Reply Quote 0
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