Cloudron makes it easy to run web apps like WordPress, Nextcloud, GitLab on your server. Find out more or install now.


Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Bookmarks
  • Search
Skins
  • Light
  • Cerulean
  • Cosmo
  • Flatly
  • Journal
  • Litera
  • Lumen
  • Lux
  • Materia
  • Minty
  • Morph
  • Pulse
  • Sandstone
  • Simplex
  • Sketchy
  • Spacelab
  • United
  • Yeti
  • Zephyr
  • Dark
  • Cyborg
  • Darkly
  • Quartz
  • Slate
  • Solar
  • Superhero
  • Vapor

  • Default (No Skin)
  • No Skin
Collapse
Brand Logo

Cloudron Forum

Apps | Demo | Docs | Install
  1. Cloudron Forum
  2. Support
  3. Email sending broken after updating to 8.2.x (due to IPv6 issues)

Email sending broken after updating to 8.2.x (due to IPv6 issues)

Scheduled Pinned Locked Moved Solved Support
ipv6emailupdate8.2.3
74 Posts 13 Posters 12.3k Views 13 Watching
  • 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.
  • P Offline
    P Offline
    privsec
    wrote on last edited by
    #58

    Ok, its not working again (or maybe it never did.

    These are my screens

    image.png

    image.png

    image.png

    image.png
    From my understadning, it is set up correctly.

    jdaviescoatesJ 1 Reply Last reply
    0
    • P privsec

      Ok, its not working again (or maybe it never did.

      These are my screens

      image.png

      image.png

      image.png

      image.png
      From my understadning, it is set up correctly.

      jdaviescoatesJ Offline
      jdaviescoatesJ Offline
      jdaviescoates
      wrote on last edited by
      #59

      @privsec said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

      its not working again

      What exactly isn't working?

      Have you set up the ipv6 reverse dns/ PTR /rDNS record too?

      I use Cloudron with Gandi & Hetzner

      avatar1024A 1 Reply Last reply
      1
      • jdaviescoatesJ jdaviescoates

        @privsec said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

        its not working again

        What exactly isn't working?

        Have you set up the ipv6 reverse dns/ PTR /rDNS record too?

        avatar1024A Offline
        avatar1024A Offline
        avatar1024
        wrote on last edited by
        #60

        @jdaviescoates said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

        What exactly isn't working?

        I imagine they are getting bounce to Gmail.

        @jdaviescoates said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

        Have you set up the ipv6 reverse dns/ PTR /rDNS record too?

        Looks like they have looking at screenshot 2....but possibly badly. I think it should say my.businessdoctorut.com

        Though for me, after setting it all up properly I kept getting issues and random bounces with the same error message. Only completely disabling IPv6 from the network interface works (and even that turned out to be a struggle 😰)

        P 1 Reply Last reply
        1
        • avatar1024A avatar1024

          @jdaviescoates said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

          What exactly isn't working?

          I imagine they are getting bounce to Gmail.

          @jdaviescoates said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

          Have you set up the ipv6 reverse dns/ PTR /rDNS record too?

          Looks like they have looking at screenshot 2....but possibly badly. I think it should say my.businessdoctorut.com

          Though for me, after setting it all up properly I kept getting issues and random bounces with the same error message. Only completely disabling IPv6 from the network interface works (and even that turned out to be a struggle 😰)

          P Offline
          P Offline
          privsec
          wrote on last edited by
          #61

          @avatar1024 My mail server location is b0d6d65a-4adf-4129-a4e0-aaf0455d485f-image.png

          I do keep getting bounced emails from Gmail.

          avatar1024A 1 Reply Last reply
          2
          • potemkin_aiP Offline
            potemkin_aiP Offline
            potemkin_ai
            wrote on last edited by
            #62

            Just in case - I've just found that IPv6 might be enabled at the NetPlan level, despite all of the sysctl and other configs.

            To disable - add to the appropriate yaml file in /etc/netplan - link-local: [ ipv4 ] - on the same level as dhcp instruction. Run netplan try and netplan apply if you are lucky.

            That seems to disable IPv6 on Linux.

            <rant> Linux start looking more and more like Windows 😢 </rant>

            avatar1024A 1 Reply Last reply
            2
            • potemkin_aiP potemkin_ai

              Just in case - I've just found that IPv6 might be enabled at the NetPlan level, despite all of the sysctl and other configs.

              To disable - add to the appropriate yaml file in /etc/netplan - link-local: [ ipv4 ] - on the same level as dhcp instruction. Run netplan try and netplan apply if you are lucky.

              That seems to disable IPv6 on Linux.

              <rant> Linux start looking more and more like Windows 😢 </rant>

              avatar1024A Offline
              avatar1024A Offline
              avatar1024
              wrote on last edited by avatar1024
              #63

              @potemkin_ai said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

              I've just found that IPv6 might be enabled at the NetPlan level

              Yep this has been discussed above in this thread...from post #52 onward. The solution provided by @joseph worked on my end. I had originally tried something along the line you mentioned (adding link-local: [ ipv4 ] to the yaml file but that didn't work...although I might have done it wrong).

              1 Reply Last reply
              0
              • P privsec

                @avatar1024 My mail server location is b0d6d65a-4adf-4129-a4e0-aaf0455d485f-image.png

                I do keep getting bounced emails from Gmail.

                avatar1024A Offline
                avatar1024A Offline
                avatar1024
                wrote on last edited by
                #64

                @privsec said in Email sending broken after updating to 8.2.x (due to IPv6 issues):

                I do keep getting bounced emails from Gmail.

                In that case I would just disable IPv6 altogether from your server network interface. That's the only only thing that worked for me.

                1 Reply Last reply
                0
                • P Offline
                  P Offline
                  privsec
                  wrote on last edited by
                  #65

                  OK, sorry I am off and on. I do not do this as a full time job. I need this resolved but im lost as to what to do.

                  At this point, I just want to future proof myself from IPV6. How do I permanently disable and remove this functionality on my VPS from Netcup.

                  GengarG 1 Reply Last reply
                  0
                  • girishG Offline
                    girishG Offline
                    girish
                    Staff
                    wrote on last edited by
                    #66

                    @Gengar I signed up but it is stuck in "Order Pending"

                    GengarG 1 Reply Last reply
                    1
                    • P privsec

                      OK, sorry I am off and on. I do not do this as a full time job. I need this resolved but im lost as to what to do.

                      At this point, I just want to future proof myself from IPV6. How do I permanently disable and remove this functionality on my VPS from Netcup.

                      GengarG Offline
                      GengarG Offline
                      Gengar
                      wrote on last edited by Gengar
                      #67

                      @privsec Are you also having the issue of PTR6 value turning to "null" ?

                      73040c11-a1eb-44ad-92d4-c946be1ae94f-image.png

                      @privsec why would you turn off IPv6 completly ? You can do it but why ? I understood that emails servers from Google and Microsoft are now using full IPv6 resolution and if they receive an email coming from an IPv4 mail server they may or will consider it as spam more easily...

                      But regarding your question @privsec , how to disable IPv6 completly, I think I would do it on the OS level because I've seen that IPv6 is not enabled inside the docker containers.

                      First I would start to disable it temporarily using this command as I did in my tests before :
                      sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1

                      It will disable ipv6 until next reboot.

                      And if it works like that for you, then you can reboot your server and try to disable it permanently by creating a new file : sudo nano /etc/sysctl.d/10-disable-ipv6.conf

                      And you write this in this file :

                      net.ipv6.conf.all.disable_ipv6 = 1
                      net.ipv6.conf.default.disable_ipv6 = 1
                      

                      to save your file and quit nano
                      CTRL+0 - ENTER - CTRL+X

                      And then apply this new config file by doing :
                      sudo sysctl --system

                      And IPv6 should be disabled completly at the OS level. Reboot your server.

                      1 Reply Last reply
                      1
                      • girishG girish forked this topic on
                      • girishG Offline
                        girishG Offline
                        girish
                        Staff
                        wrote on last edited by
                        #68

                        I spun the infomaniak postings to a separate thread - https://forum.cloudron.io/topic/13566/infomaniak-ipv6-issues

                        1 Reply Last reply
                        1
                        • P Offline
                          P Offline
                          privsec
                          wrote on last edited by
                          #69

                          My IPV6 in the dashboard is reporting working just fine.
                          image.png

                          Emails are not sending to gmail emails and I need this resolved.

                          1 Reply Last reply
                          0
                          • P Offline
                            P Offline
                            privsec
                            wrote on last edited by
                            #70

                            Who can I pay to solve this for me?

                            scookeS jdaviescoatesJ 2 Replies Last reply
                            0
                            • P privsec

                              Who can I pay to solve this for me?

                              scookeS Offline
                              scookeS Offline
                              scooke
                              wrote on last edited by
                              #71

                              @privsec A new vps provider. Choose one which others use with no problems.

                              A life lived in fear is a life half-lived

                              1 Reply Last reply
                              1
                              • P privsec

                                Who can I pay to solve this for me?

                                jdaviescoatesJ Offline
                                jdaviescoatesJ Offline
                                jdaviescoates
                                wrote on last edited by
                                #72

                                @privsec @avatar1024 had this issue and I think resolved it in the end?

                                What VPS are you on?

                                I use Cloudron with Gandi & Hetzner

                                P 1 Reply Last reply
                                0
                                • jdaviescoatesJ jdaviescoates

                                  @privsec @avatar1024 had this issue and I think resolved it in the end?

                                  What VPS are you on?

                                  P Offline
                                  P Offline
                                  privsec
                                  wrote on last edited by
                                  #73

                                  @jdaviescoates I use netcup.

                                  But if another vps is better I’d happily switch.

                                  1 Reply Last reply
                                  0
                                  • avatar1024A Offline
                                    avatar1024A Offline
                                    avatar1024
                                    wrote on last edited by avatar1024
                                    #74

                                    I use netcup too, I disabled IPv6 on the server entirely and since everything has been working with no issues.

                                    Though disabling IPv6 persistently on reboot was not straightforward and had to be done modifying netplan config, see above on the thread (https://forum.cloudron.io/post/102554).

                                    1 Reply Last reply
                                    1
                                    Reply
                                    • Reply as topic
                                    Log in to reply
                                    • Oldest to Newest
                                    • Newest to Oldest
                                    • Most Votes


                                    • Login

                                    • Don't have an account? Register

                                    • Login or register to search.
                                    • First post
                                      Last post
                                    0
                                    • Categories
                                    • Recent
                                    • Tags
                                    • Popular
                                    • Bookmarks
                                    • Search