The case of lacking an /etc/mailname is https://bugs.launchpad.net/bzr/+bug/884502
Note that you don't need to have an actual mailer, just a mailname that contains one line giving the mail domain of the box.
The case of lacking an /etc/mailname is https:/ /bugs.launchpad .net/bzr/ +bug/884502
Note that you don't need to have an actual mailer, just a mailname that contains one line giving the mail domain of the box.