我需要一些帮助。
我从这里开始提到：在这篇文章中这篇文章
nitapika@nitapika-51:~$ echo bla | mail -s testmail lisa@you5.com
The program 'mail' is currently not installed. You can install it by typing:
sudo apt-get install mailutils
然后安装 mailutils:并收到此错误
Running newaliases
newaliases: warning: valid_hostname: numeric hostname: 04
newaliases: fatal: file /etc/postfix/main.cf: parameter mydomain: bad parameter value: 04
dpkg: error processing package postfix (--configure):
subprocess installed post-installation script returned error exit status 75
dpkg: dependency problems prevent configuration of mailutils:
mailutils depends on default-mta | mail-transport-agent; however:
Package …