I think I got it now. Postconf can't read valiases.cf as user Postfix. I changed the file ownership and permission to allow group postfix to read it, which makes running postconf as user postfix work now.
Curiously the segfault still happens every 5 minutes. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1753470 Title: Postconf segfaults every 5 minutes To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1753470/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs