thats via of course
cat file | mail alias
Personal and systemwide distribution lists. It is also possible to create a personal distribution lists so that, for instance, you can send mail to ``cohorts'' and have it go to a group of people. Such lists can be defined by placing a line like
alias cohorts bill ozalp jkf mark kridle@ucbcory.com
in the file .mailrc in your home directory. The current list of such aliases can be displayed with the alias command in mail. System wide dis- tribution lists can be created by editing /etc/aliases, see aliases(5) and sendmail(8); these are kept in a different syntax. In mail you send, personal aliases will be expanded in mail sent to others so that they will be able to reply to the recipients. System wide aliases are not expanded when the mail is sent, but any reply returned to the machine will have the system wide alias expanded as all mail goes through sendmail.