I made a change to the /etc/aliases file and ran the /usr/bin/newaliases
command to update the aliases databases. I received the error message:
newaliases: cannot open '/etc/aliases': No such file or directory
The /etc/aliases file exists. It is owned by root and has 644 permissions.
Opening permissions (666) didn't help.
workaround is to remove single-quotes around /etc/aliases in sendmail.cf
*** This bug has been marked as a duplicate of 23900 ***