Navigation

    Kopano
    • Register
    • Login
    • Search
    • Categories
    • Get Official Kopano Support
    • Recent
    Statement regarding the closure of the Kopano community forum and the end of the community edition

    outgoing smime signature broken

    Plugins for Kopano WebApp
    2
    6
    823
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • gerd
      gerd last edited by

      Hi Forum,

      if i send a signed mail with kopano webapp an the smime plugin, the signature is broken.

      I tried the following combinations:
      webapp -> Thunderbird = Thunderbird reports Signature broken
      Thunderbird -> Webapp = Webapp reports good signature
      Webapp -> webapp = Webapp reports broken signature
      Thunderbird -> Thunderbirs = TB reports good signature

      Can someone give me hint how to debug further?

      Yours,
      Gerd

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

        I cannot get smime signatures to work correctly. S-Mime Encryption works fine, but every outgoing signature is broken.

        Thunderbird says “Die Nachricht enthält eine digitale Unterschrift, aber die Unterschrift ist ungültig. Die Unterschift stimmt nicht korrekt mit dem Nachrichteninhalt überein. Die Nachricht scheint verändert worden zu sein, nachdem der Absender sie unterschrieben hat.”

        which is german for (more or less) “The message contains a digital signature, but the signature is not valid. The signature does not correspond to the message content. The Message seems to have been changed after the sender has signed it”

        I used the recent smime plugin smime-2.4.0.4 as well as an older 2.3 version.

        All certificates are correct and trusted on sender an receivers system.

        So my question is:

        Does it work for anyone else to verify a signature that was made with kopano-webapp?

        Yours,
        Gerd

        caheba 1 Reply Last reply Reply Quote 0
        • caheba
          caheba @gerd last edited by

          @gerd
          Hi gerd,
          same issue on my side: sending from Outlook via Kopano to external causes a broken signature.
          I am seeing the same issue, when sending mails to team members (distribution list) but not when
          sending an E-Mail to myself (inside the company).
          Sending signed E-Mails from outside (other domain) to my account works fine: E-Mails are shown as signed with
          no change of content.

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

            Hi Kopano-Community!

            Problem still persists. Therefore again my question:

            Is there anyone who can create valid smime signed Mails with webapp and the smime plugin?

            Yours, Gerd

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

              I just found out, that if i switch from of HTML to TEXT in the mail settings of webapp, signatures are verified correctly.

              Yeah!
              Gerd

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

                Another result from my testings:

                The Signature on “Signed Only” E-mail only stays intact if webapp is set to plaintext (not html) AND the lines are shorter than 907 characters.

                If the lines are longer some component in the chain seems to break lines after the smime plugin has made its signature. This of course makes the signature invalid for the receiver.

                The mail in the Sent-Folder of webapp does not show the broken lines. Therefore Webapp itself verifies its own signature correctly in the sent-folder.

                So long
                Gerd

                1 Reply Last reply Reply Quote 0
                • First post
                  Last post