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    Solved Postfix problem receiving email to relay

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    postfix error timeout centos 7
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    • S
      scottalanmiller
      last edited by

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

      J 1 Reply Last reply Reply Quote 0
      • J
        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.

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        • J
          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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          • J
            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:
            
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            • J
              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
              
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              • T
                triple9
                last edited by

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

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

                  @triple9 said in Postfix problem receiving email to relay:

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

                  nope.

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                  • J
                    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
                    
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                    • S
                      scottalanmiller
                      last edited by

                      Ah ha. DHCP strikes again 🙂

                      J 1 Reply Last reply Reply Quote 0
                      • J
                        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.

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                        • J
                          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=<adbc9eb08cdcc4b8e90d2cddad5e079e@oc.domain.com>
                          Mar  7 11:25:24 relay01 postfix/qmgr[1665]: CB2E6C0C82CB: from=<admin@domain.com>, 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=<admin@domain.com>, 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 <adbc9eb08cdcc4b8e90d2cddad5e079e@oc.domain.com> [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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