Public bug reported: After updating from 20.10 to 21.04 (Xubuntu) I ended up during upgrade asked if I want "internet site" or "Local only" configuration on postfix. Since not planning on having FQDN mail server on this machine, I choosed Local only. If I remove 2 dots from hostname = in /etc/postfix/main.cf , they get re-added after ' apt upgrade ' and that seems to stop packages upgrade process on machine.
Setting up postfix (3.5.6-1) ... setting myhostname=xdesk.. in /etc/postfix Postfix (main.cf) is now set up with the changes above. If you need to make changes, edit /etc/postfix/main.cf (and others) as needed. To view Postfix configuration values, see postconf(1). After modifying main.cf, be sure to run 'systemctl reload postfix'. Running newaliases newaliases: warning: valid_hostname: misplaced delimiter: xdesk.. newaliases: fatal: file /etc/postfix/main.cf: parameter myhostname: bad parameter value: xdesk.. dpkg: error processing package postfix (--configure): installed postfix package post-installation script subprocess returned error exit status 75 Processing triggers for libc-bin (2.33-0ubuntu5) ... Errors were encountered while processing: postfix E: Sub-process /usr/bin/dpkg returned an error code (1) ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: postfix 3.5.6-1 ProcVersionSignature: Ubuntu 5.11.0-17.18-generic 5.11.12 Uname: Linux 5.11.0-17-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: XFCE Date: Thu May 27 09:35:04 2021 DuplicateSignature: InvalidHostOrDomain EtcMailname: *** /etc/mailname does not exist *** Hostname: xdesk PostconfMydomain: . PostconfMyhostname: xdesk.. PostconfMyorigin: $myhostname SourcePackage: postfix UpgradeStatus: Upgraded to hirsute on 2021-05-27 (0 days ago) ** Affects: postfix (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug hirsute regression-retracer ** Information type changed from Private Security to Public -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1929786 Title: Postfix Local only configuration adds 2 dots on hostname , blocking package upgrades To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1929786/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs