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    Postfix - antispam and relay package

    Scheduled Pinned Locked Moved pfSense Packages
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    • marcellocM
      marcelloc
      last edited by

      The format is

      Email@domain.com ok
      Admin@domain.com ok
      .
      .
      .

      As my active directory is on local lan, I've setup a 1h update frequecy.

      Treinamentos de Elite: http://sys-squad.com

      Help a community developer! ;D

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      • S
        Sn3ak
        last edited by

        Thanks, I haven't had a chance to try that.. I do have another problem that you may be able to help me with.

        It seems adding:
        myhostname=mx02.example.com
        smtp_helo_name=mx02.example.com

        is ignored by postfix, at first it wasn't being added to main.cf, but finally that started working, however is being ignored.

        postconf -d | grep example
        mydomain = example.local
        myhostname = pfsense.example.local

        as well as smtp_helo_name =  not being respected if changed either.

        I'm attempting to change the name to my correct external hostname so other email servers (including my primary) don't get
        upset due to the .local address

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        • marcellocM
          marcelloc
          last edited by

          Change pfsense host and domain info on system settings.

          Did you tried to paste this config on custom field and then checking config file?

          Treinamentos de Elite: http://sys-squad.com

          Help a community developer! ;D

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          • S
            Sn3ak
            last edited by

            Sorry for the late reply, as it turns out the settings did take, however postconf -d
            doesn't reflect it, and, using telnet on localhost apparently uses the default and
            ignores the setting.

            Would it be possible to add a delete option in the queue screen, since you are already displaying the Message ID?
            Command would be postsuper -d msgID. Also maybe another button at the bottom for deleting all Mailer-Daemon
            emails? Command would be: mailq | grep -v "^[^0-9A-Z]" | grep MAILER-DAEMON | awk '{print $1}' | xargs postsuper -d

            If nothing else, I can probably submit patches, as long as you are interested in including them.

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            • marcellocM
              marcelloc
              last edited by

              Good to know this package is being usefull for you. :)

              Did you applied postfix conf after changing machine name and domain?

              Patches and improvements are welcome, let me test it first before publishing.

              Treinamentos de Elite: http://sys-squad.com

              Help a community developer! ;D

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              • P
                Popupgbg
                last edited by

                Split domain mail functionality

                I don´t know if this package can do this but it would be nice to have it with a GUI. I know that sometimes hosting providers is using Postfix to provide a split domain functionality on mailservice. The use Postfix to receive all mails addressed to different recipients in different domains in Postfix. They setup the possibility to forward incoming mail so that mail to a@domain.com  is sent to an POP server and mail to b@domain.com to an Exchange server. This due to the fact that all users in an organization don´t need the functionality of an Exchange server.
                This is my request  :)

                /Thanks

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                • M
                  madas
                  last edited by

                  Hello,

                  I'm trying to modify this part of the main.cf to remove the reject_unknown_sender_domain

                  –--------------
                  smtpd_sender_restrictions = reject_unknown_sender_domain,
                  permit

                  My server is using a remote DNS so I cannot add a A or MX record for some of my local servers so I need to remove this option (or add a permit_mynetworks above it).

                  I cannot seem to do this anyway in the gui.  I can do it manually but it seems to be overwritten shortly after.

                  Any ideas?

                  Thanks

                  M

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                  • marcellocM
                    marcelloc
                    last edited by

                    Madas,

                    Include your hosts on my network acl.

                    Treinamentos de Elite: http://sys-squad.com

                    Help a community developer! ;D

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                    • M
                      madas
                      last edited by

                      I have.  The reject_unknown_sender_domain seems to be bouncing the message before the network ACL's are checked.

                      1 Reply Last reply Reply Quote 0
                      • marcellocM
                        marcelloc
                        last edited by

                        @madas:

                        I have.  The reject_unknown_sender_domain seems to be bouncing the message before the network ACL's are checked.

                        It will work if you create this dummy domain on your internal dns and point pfsense to use it.

                        Treinamentos de Elite: http://sys-squad.com

                        Help a community developer! ;D

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                        • M
                          madas
                          last edited by

                          My firewall points directly to the ISP's DNS.  I don't run a local one that is accessible from my firewall.  I just want to remove that restriction

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                          • L
                            LinuxTracker
                            last edited by

                            Finally set this up today and have read through the thread.

                            I seem to be missing something in the basic configuration.

                            Notes: I disabled the port 25 NAT and associated rule.
                            A new rule to allow port 25 to WAN Address is in place and is logged.
                            I let it run for 15+min.

                            My Port 25 Rules block 1k spam connects/hour.  I find I've grown attached to them. /notes

                            Problem:
                            If I bind to Postfix to WAN, Postfix receives and passes mail correctly; but Port 25 Rules are ignored.
                            When I bind to loopback-only, I don't see any indication that any mail is reaching Postfix.

                            In both cases, the Rule Logs show traffic being passed to the WAN address.

                            What am I missing?

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                            • marcellocM
                              marcelloc
                              last edited by

                              Hi linuxtracker,

                              When you listen postfix on loopback only, you need a Nat rule to forward traffic from wan address to localhost.

                              In both cases, you need to put block rules before allow rules on firewall tab.

                              Treinamentos de Elite: http://sys-squad.com

                              Help a community developer! ;D

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                              • L
                                LinuxTracker
                                last edited by

                                @marcelloc:

                                In both cases, you need to put block rules before allow rules on firewall tab.

                                Crap.  That is exactly what I did.  I know better too.

                                Now I have to go wear the hat for the rest of the day.

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                                • marcellocM
                                  marcelloc
                                  last edited by

                                  No intention to call you dunce, I was just posting full info to solve your problem.
                                  Sorry.  :(

                                  Treinamentos de Elite: http://sys-squad.com

                                  Help a community developer! ;D

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                                  • L
                                    LinuxTracker
                                    last edited by

                                    @marcelloc:

                                    No intention to call you dunce, I was just posting full info to solve your problem.
                                    Sorry.

                                    I wasn't irritated with you.  I was poking fun at myself for making a rookie mistake.

                                    If you hadn't set me straight, I'd probably still be banging my head against it.

                                    So - Thank you.

                                    1 Reply Last reply Reply Quote 0
                                    • D
                                      digdug3
                                      last edited by

                                      Is it possible to forward all incoming domains to another mail server after the email address had been checked?
                                      So * to ip x.x.x.x

                                      1 Reply Last reply Reply Quote 0
                                      • marcellocM
                                        marcelloc
                                        last edited by

                                        You can configure smart relay options, but I think it's not a good idea as postfix will accept any email, including relay atempts and your internal server will miss the external IP address to do spam checks.

                                        Treinamentos de Elite: http://sys-squad.com

                                        Help a community developer! ;D

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                                        • D
                                          digdug3
                                          last edited by

                                          @marcelloc:

                                          You can configure smart relay options, but I think it's not a good idea as postfix will accept any email, including relay atempts and your internal server will miss the external IP address to do spam checks.

                                          Ok, but is it possible to add the domains just like the valid recipients? e.g. a txt file from an external url?

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                                          • marcellocM
                                            marcelloc
                                            last edited by

                                            @digdug3:

                                            Ok, but is it possible to add the domains just like the valid recipients? e.g. a txt file from an external url?

                                            I think it's not a good idea as this setup may forward many open relay attempts to your internal server and it will not be able to test external ip as you  'proxied' connection with postifx ip.

                                            Treinamentos de Elite: http://sys-squad.com

                                            Help a community developer! ;D

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