Dear Bastian, Bastian Blank <bastian+postfix-users=postfix....@waldi.eu.org> writes:
> Hi > > On Sun, May 08, 2022 at 07:42:00PM +0900, Byung-Hee HWANG wrote: >> May 8 10:24:25 bionic190316003 postfix/smtpd[10918]: warning: >> 17.188.51.209.list.dnswl.org: RBL lookup error: Host or domain name >> not found. Name service error for name=17.188.51.209.list.dnswl.org >> type=A: Host not found, try again >> As shown above log, the line 'RBL lookup error' is normal? Can i ignore that? > > No, this line is not normal. It means you have an error in the DNS > resolution. Maybe you are using a public resolver. Thanks for quick reply Bastian! Below is my /etc/resolv.conf: #+begin_src text (/etc/resolv.conf in Google Compute Engine) soyeomul@bionic190316003:~$ sudo cat /etc/resolv.conf # This file is managed by man:systemd-resolved(8). Do not edit. # # This is a dynamic resolv.conf file for connecting local clients to the # internal DNS stub resolver of systemd-resolved. This file lists all # configured search domains. # # Run "systemd-resolve --status" to see details about the uplink DNS servers # currently in use. # # Third party programs must not access this file directly, but only through the # symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way, # replace this symlink by a static file or a different symlink. # # See man:systemd-resolved.service(8) for details about the supported modes of # operation for /etc/resolv.conf. nameserver 127.0.0.53 options edns0 search us-west1-b.c.elite-flow-234711.internal c.elite-flow-234711.internal google.internal soyeomul@bionic190316003:~$ #+end_src Possibly i would like to solve this problem. Thanks! Sincerely, Linux fan Byung-Hee -- ^고맙습니다 _布德天下_ 감사합니다_^))//
