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    Office 365 SMTP server not advertising StartTLS

    Scheduled Pinned Locked Moved IT Discussion
    office 365smtp
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    • wrx7mW
      wrx7m @flaxking
      last edited by

      @flaxking Gotcha. But, it has caused issues depending on how you are connecting and what you are connecting with. I had issues connecting with Windows 7 and Outlook and was told by support to apply registry fix and make sure a certain update was applied.

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

        Isn't the list of SMTP commands given before there is any attempt to bring up a TLS tunnel? Assuming my understanding of that is correct - then it shouldn't matter what version of TLS is supported - the advertising of STARTTLS should still be in the list - and the library's aren't seeing them - right?

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        • F
          flaxking
          last edited by

          From what I heard from our tech, it sounds like the company's UTM was messing with it.

          scottalanmillerS dbeatoD 2 Replies Last reply Reply Quote 0
          • scottalanmillerS
            scottalanmiller @flaxking
            last edited by

            @flaxking said in Office 365 SMTP server not advertising StartTLS:

            From what I heard from our tech, it sounds like the company's UTM was messing with it.

            That's quite possible. UTMs can introduce a lot of problems.

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

              @scottalanmiller said in Office 365 SMTP server not advertising StartTLS:

              @flaxking said in Office 365 SMTP server not advertising StartTLS:

              From what I heard from our tech, it sounds like the company's UTM was messing with it.

              That's quite possible. UTMs can introduce a lot of problems.

              LOL I was going to say the same thing...

              1 Reply Last reply Reply Quote 0
              • dbeatoD
                dbeato @flaxking
                last edited by

                @flaxking said in Office 365 SMTP server not advertising StartTLS:

                From what I heard from our tech, it sounds like the company's UTM was messing with it.

                Which UTM? Hopefully not SOnicwall in this case.

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

                  @dbeato said in Office 365 SMTP server not advertising StartTLS:

                  @flaxking said in Office 365 SMTP server not advertising StartTLS:

                  From what I heard from our tech, it sounds like the company's UTM was messing with it.

                  Which UTM? Hopefully not SOnicwall in this case.

                  Hopefully it IS SonicWall, so that all these stupid issues can be isolated to one bad vendor rather than sprawling across the industry.

                  dbeatoD 1 Reply Last reply Reply Quote 1
                  • dbeatoD
                    dbeato @scottalanmiller
                    last edited by

                    @scottalanmiller said in Office 365 SMTP server not advertising StartTLS:

                    @dbeato said in Office 365 SMTP server not advertising StartTLS:

                    @flaxking said in Office 365 SMTP server not advertising StartTLS:

                    From what I heard from our tech, it sounds like the company's UTM was messing with it.

                    Which UTM? Hopefully not SOnicwall in this case.

                    Hopefully it IS SonicWall, so that all these stupid issues can be isolated to one bad vendor rather than sprawling across the industry.

                    They are not the only one as I can mention many....

                    1 Reply Last reply Reply Quote 0
                    • F
                      flaxking
                      last edited by

                      No idea, we don't manage the client's infrastructure

                      StrongBadS 1 Reply Last reply Reply Quote 0
                      • StrongBadS
                        StrongBad @flaxking
                        last edited by

                        @flaxking said in Office 365 SMTP server not advertising StartTLS:

                        No idea, we don't manage the client's infrastructure

                        Then it was definitely the UTM, no question.

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