As the whole issue is solved if I change my hostname from 0111055 to D0111055 I guess I was right.
A little look in the original bug shows by the way another strange behaviour: his name contained a . -> as a hostname postfix only handles the part after the . which was only a number... ** Changed in: postfix (Ubuntu) Status: New => Confirmed -- package postfix 2.5.5-1.1 failed to install/upgrade: subprocess post-installation script returned error exit status 75 https://bugs.launchpad.net/bugs/429769 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs