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    Solved Postfix problem receiving email to relay

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    postfix error timeout centos 7
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    • scottalanmillerS
      scottalanmiller
      last edited by

      Any chance that you are experiencing packet loss or something like that?

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

        @scottalanmiller said in Postfix problem receiving email to relay:

        Any chance that you are experiencing packet loss or something like that?

        From the first one, which is a copier, yes. That is why I did a test send in owncloud. That is a VM on the same hypervisor..

        1 Reply Last reply Reply Quote 0
        • art_of_shredA
          art_of_shred Banned
          last edited by

          NIC on the fritz?

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

            @art_of_shred said in Postfix problem receiving email to relay:

            NIC on the fritz?

            VM to VM on the same HV would bypass that, even if the NIC caught fire and was in a pile of goo.

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

              Any clue of another log to look into? Server was rebooted, drive space is stupid extra. because when the VM was created, I apparently neglected to change the Hyper-V default of 127GB

              [root@relay01 ~]# df -h
Filesystem                       Size  Used Avail Use% Mounted on
/dev/mapper/centos_relay01-root   50G  1.7G   49G   4% /
devtmpfs                         229M     0  229M   0% /dev
tmpfs                            240M     0  240M   0% /dev/shm
tmpfs                            240M  4.3M  235M   2% /run
tmpfs                            240M     0  240M   0% /sys/fs/cgroup
/dev/sda2                        497M  280M  218M  57% /boot
/dev/sda1                        200M  9.5M  191M   5% /boot/efi
/dev/mapper/centos_relay01-home   76G   33M   76G   1% /home
tmpfs                             48M     0   48M   0% /run/user/0
              1 Reply Last reply Reply Quote 1
              • scottalanmillerS
                scottalanmiller
                last edited by

                maillog and messages should cover anything likely to have happened.

                No package updates?

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

                  @scottalanmiller said in Postfix problem receiving email to relay:

                  maillog and messages should cover anything likely to have happened.

                  No package updates?

                  nope.

                  [root@relay01 ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.team-cymru.org
 * extras: mirror.compevo.com
 * updates: repos.lax.quadranet.com
No packages marked for update
                  scottalanmillerS 1 Reply Last reply Reply Quote 0
                  • scottalanmillerS
                    scottalanmiller @JaredBusch
                    last edited by

                    @JaredBusch said in Postfix problem receiving email to relay:

                    @scottalanmiller said in Postfix problem receiving email to relay:

                    maillog and messages should cover anything likely to have happened.

                    No package updates?

                    nope.

                    [root@relay01 ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.team-cymru.org
 * extras: mirror.compevo.com
 * updates: repos.lax.quadranet.com
No packages marked for update

                    Sorry, I meant historically, like yesterday before the issue came up. Check the yumlog.

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

                      @scottalanmiller said in Postfix problem receiving email to relay:

                      @JaredBusch said in Postfix problem receiving email to relay:

                      @scottalanmiller said in Postfix problem receiving email to relay:

                      maillog and messages should cover anything likely to have happened.

                      No package updates?

                      nope.

                      [root@relay01 ~]# yum update
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirror.team-cymru.org
 * extras: mirror.compevo.com
 * updates: repos.lax.quadranet.com
No packages marked for update

                      Sorry, I meant historically, like yesterday before the issue came up. Check the yumlog.

                      March 4th was the last update.

                      Mar 04 09:11:26 Updated: systemd-libs.x86_64 219-30.el7_3.7
Mar 04 09:11:27 Updated: libgudev1.x86_64 219-30.el7_3.7
Mar 04 09:11:27 Updated: audit-libs.x86_64 2.6.5-3.el7_3.1
Mar 04 09:11:32 Updated: systemd.x86_64 219-30.el7_3.7
Mar 04 09:11:32 Updated: systemd-sysv.x86_64 219-30.el7_3.7
Mar 04 09:11:33 Updated: wpa_supplicant.x86_64 1:2.0-21.el7_3
Mar 04 09:11:33 Updated: device-mapper-libs.x86_64 7:1.02.135-1.el7_3.3
Mar 04 09:11:33 Updated: device-mapper.x86_64 7:1.02.135-1.el7_3.3
Mar 04 09:11:33 Updated: device-mapper-event-libs.x86_64 7:1.02.135-1.el7_3.3
Mar 04 09:11:33 Updated: NetworkManager-libnm.x86_64 1:1.4.0-17.el7_3
Mar 04 09:11:34 Updated: device-mapper-event.x86_64 7:1.02.135-1.el7_3.3
Mar 04 09:11:34 Updated: lvm2-libs.x86_64 7:2.02.166-1.el7_3.3
Mar 04 09:11:34 Updated: polkit.x86_64 0.112-11.el7_3
Mar 04 09:11:36 Updated: NetworkManager.x86_64 1:1.4.0-17.el7_3
Mar 04 09:11:37 Updated: NetworkManager-wwan.x86_64 1:1.4.0-17.el7_3
Mar 04 09:11:38 Updated: kernel-tools-libs.x86_64 3.10.0-514.10.2.el7
Mar 04 09:11:38 Updated: python-firewall.noarch 0.4.3.2-8.1.el7_3.2
Mar 04 09:11:53 Updated: selinux-policy.noarch 3.13.1-102.el7_3.15
Mar 04 09:11:53 Updated: firewalld-filesystem.noarch 0.4.3.2-8.1.el7_3.2
Mar 04 09:11:54 Updated: firewalld.noarch 0.4.3.2-8.1.el7_3.2
Mar 04 09:12:12 Updated: selinux-policy-targeted.noarch 3.13.1-102.el7_3.15
Mar 04 09:12:14 Updated: kernel-tools.x86_64 3.10.0-514.10.2.el7
Mar 04 09:12:14 Updated: NetworkManager-bluetooth.x86_64 1:1.4.0-17.el7_3
Mar 04 09:12:14 Updated: NetworkManager-wifi.x86_64 1:1.4.0-17.el7_3
Mar 04 09:12:14 Updated: NetworkManager-tui.x86_64 1:1.4.0-17.el7_3
Mar 04 09:12:14 Updated: NetworkManager-adsl.x86_64 1:1.4.0-17.el7_3
Mar 04 09:12:14 Updated: NetworkManager-team.x86_64 1:1.4.0-17.el7_3
Mar 04 09:12:16 Updated: lvm2.x86_64 7:2.02.166-1.el7_3.3
Mar 04 09:12:16 Updated: audit.x86_64 2.6.5-3.el7_3.1
Mar 04 09:12:17 Updated: microcode_ctl.x86_64 2:2.1-16.3.el7_3
Mar 04 09:12:17 Updated: NetworkManager-glib.x86_64 1:1.4.0-17.el7_3
Mar 04 09:12:18 Updated: python-perf.x86_64 3.10.0-514.10.2.el7
Mar 04 09:12:29 Installed: kernel.x86_64 3.10.0-514.10.2.el7
                      1 Reply Last reply Reply Quote 0
                      • JaredBuschJ
                        JaredBusch
                        last edited by

                        Looks like it started march 2

                        Mar  1 08:44:04 relay01 postfix/smtpd[4139]: connect from ljcm6040.domain.local[10.201.1.11]
Mar  1 08:44:05 relay01 postfix/smtpd[4139]: 04E9EC0C82C7: client=ljcm6040.domain.local[10.201.1.11]
Mar  1 08:44:07 relay01 postfix/cleanup[4141]: 04E9EC0C82C7: message-id=<>
Mar  1 08:44:08 relay01 postfix/qmgr[1710]: 04E9EC0C82C7: from=<[email protected]>, size=70941, nrcpt=1 (queue active)
Mar  1 08:44:08 relay01 postfix/smtpd[4139]: disconnect from ljcm6040.domain.local[10.201.1.11]
Mar  1 08:44:11 relay01 postfix/smtp[4142]: 04E9EC0C82C7: to=<[email protected]>, relay=domain-com.mail.protection.out$
Mar  1 08:44:11 relay01 postfix/qmgr[1710]: 04E9EC0C82C7: removed
Mar  1 16:13:58 relay01 postfix/postfix-script[1620]: starting the Postfix mail system
Mar  1 16:13:58 relay01 postfix/master[1630]: daemon started -- version 2.10.1, configuration /etc/postfix
Mar  2 07:11:11 relay01 postfix/smtpd[10917]: connect from nginx.domain.local[10.201.1.18]
Mar  2 07:16:11 relay01 postfix/smtpd[10917]: timeout after CONNECT from nginx.domain.local[10.201.1.18]
Mar  2 07:16:11 relay01 postfix/smtpd[10917]: disconnect from nginx.domain.local[10.201.1.18]

                        The yum.log went from Feb 23 to March 4, so I would say nothing there.

                        Feb 23 04:05:31 Installed: kernel.x86_64 3.10.0-514.6.2.el7
Mar 04 09:11:26 Updated: systemd-libs.x86_64 219-30.el7_3.7
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                        • scottalanmillerS
                          scottalanmiller
                          last edited by

                          Do you have any TLS here? Any cert expire?

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

                            Not yet for postfix. That is on my to do list, https://mangolassi.it/topic/12545/how-do-i-setup-tls-on-a-postfix-relay

                            1 Reply Last reply Reply Quote 0
                            • triple9T
                              triple9
                              last edited by

                              Maybe your firewall is blocking connection. Try to stop firewall and check if it works. Maybe you or somebody else changed some rules.

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

                                The odd part is that the initial connection works, then it drops afterwards.

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

                                  @scottalanmiller said in Postfix problem receiving email to relay:

                                  The odd part is that the initial connection works, then it drops afterwards.

                                  right. that is what has me confused.

                                  1 Reply Last reply Reply Quote 0
                                  • JaredBuschJ
                                    JaredBusch @triple9
                                    last edited by

                                    @triple9 said in Postfix problem receiving email to relay:

                                    Maybe your firewall is blocking connection. Try to stop firewall and check if it works. Maybe you or somebody else changed some rules.

                                    No one else even knows how to handle this.

                                    Related note, I need to get more documentation in place.

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                                    • JaredBuschJ
                                      JaredBusch
                                      last edited by

                                      firewalld has port 25 allowed.

                                      [root@relay01 ~]# firewall-cmd --list-all
public (active)
  target: default
  icmp-block-inversion: no
  interfaces: eth0
  sources:
  services: dhcpv6-client ssh
  ports: 25/tcp
  protocols:
  masquerade: no
  forward-ports:
  sourceports:
  icmp-blocks:
  rich rules:
                                      1 Reply Last reply Reply Quote 0
                                      • JaredBuschJ
                                        JaredBusch
                                        last edited by

                                        Postfix config has not been touched since setup a year ago.

                                        [root@relay01 ~]# ls -l /etc/postfix/main.cf
-rw-r--r--. 1 root root 27281 Mar 14  2016 /etc/postfix/main.cf
                                        1 Reply Last reply Reply Quote 0
                                        • triple9T
                                          triple9
                                          last edited by

                                          Is there any filtering in postfix, like amavis, spamassassin?

                                          JaredBuschJ 1 Reply Last reply Reply Quote 0
                                          • JaredBuschJ
                                            JaredBusch @triple9
                                            last edited by

                                            @triple9 said in Postfix problem receiving email to relay:

                                            Is there any filtering in postfix, like amavis, spamassassin?

                                            nope.

                                            1 Reply Last reply Reply Quote 0
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