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    Solved Postfix problem receiving email to relay

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    postfix error timeout centos 7
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    • 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
        1 Reply Last reply Reply Quote 0
        • 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.

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

                              And problem resolved.

                              On the 1st, the damned DHCP lease had failed again due to the mysterious time drift issues I have been tracking down in another thread.

                              But I needed this system up so I launched nmtui and set a static IP.... Wait for it.. to 10.201.1.12/32

                              /fucking sigh....

                              I also enabled the Time Synchronization in Hyper-V on March 1st. As soon as I fixed the /32, this morning, the Hyper-V integration started fixing the time every 5 seconds.. screw that. Turned it back off. I will count on chronyd it works well as long as the IP stays online.

                              [root@relay01 ~]# tail -f /var/log/messages
Mar  7 11:18:33 relay01 systemd: Time has been changed
Mar  7 11:18:38 relay01 systemd: Time has been changed
Mar  7 11:18:43 relay01 systemd: Time has been changed
Mar  7 11:18:48 relay01 systemd: Time has been changed
Mar  7 11:18:53 relay01 systemd: Time has been changed
Mar  7 11:18:58 relay01 systemd: Time has been changed
Mar  7 11:19:03 relay01 systemd: Time has been changed
Mar  7 11:19:08 relay01 systemd: Time has been changed
Mar  7 11:19:13 relay01 systemd: Time has been changed
Mar  7 11:19:18 relay01 systemd: Time has been changed
                              1 Reply Last reply Reply Quote 1
                              • scottalanmillerS
                                scottalanmiller
                                last edited by

                                Ah ha. DHCP strikes again 🙂

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

                                  @scottalanmiller said in Postfix problem receiving email to relay:

                                  Ah ha. DHCP strikes again 🙂

                                  I really want to figure out what is causing these VM's to do that. it is not normal.

                                  This problem was caused by me not being careful enough when I changed something to avoid the DHCP problem.

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

                                    And there goes a successful mail test.

                                    Mar  7 11:25:24 relay01 postfix/smtpd[2206]: connect from owncloud.domain.local[10.201.1.17]
Mar  7 11:25:24 relay01 postfix/smtpd[2206]: CB2E6C0C82CB: client=owncloud.domain.local[10.201.1.17]
Mar  7 11:25:24 relay01 postfix/cleanup[2208]: CB2E6C0C82CB: message-id=<[email protected]>
Mar  7 11:25:24 relay01 postfix/qmgr[1665]: CB2E6C0C82CB: from=<[email protected]>, size=591, nrcpt=1 (queue active)
Mar  7 11:25:24 relay01 postfix/smtpd[2206]: disconnect from owncloud.domain.local[10.201.1.17]
Mar  7 11:25:26 relay01 postfix/smtp[2209]: CB2E6C0C82CB: to=<[email protected]>, relay=domain-com.mail.protection.outlook.com[216.32.181.170]:25, delay=2.1, delays=0.05/0/0.62/1.4, dsn=2.6.0, status=sent (250 2.6.0 <[email protected]> [InternalId=42704859829911, Hostname=SN1PR0201MB1854.namprd02.prod.outlook.com] 7564 bytes in 0.244, 30.254 KB/sec Queued mail for delivery)
Mar  7 11:25:26 relay01 postfix/qmgr[1665]: CB2E6C0C82CB: removed
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