Thanks for reporting this bug. As the error message indicated, your hostname is purely numeric and not valid. Please change your hostname to something not completely numeric, like 'u10'. Newaliases should then succeed.
Please respond if you need more help to get past this. ** Changed in: postfix (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1070617 Title: package postfix 2.9.3-2ubuntu2 failed to install/upgrade: sub-processo script post-installation instalado retornou estado de saída de erro 75 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1070617/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs