newaliases - rebuild the database for the mail aliases file
newaliases
The newaliases utility rebuilds the random access database for the mail aliases file /etc/mail/aliases. It must be run each time this file is changed in order for the change to take effect.
The newaliases utility is identical to sendmail -bi.
The newaliases utility exits 0 on success, and >0 if an error occurs.
aliases(5)
sendmail(1)