Very Computer

Greetings,

I am receiving this error message from Sendmail 8.9.0.

hash map "Alias0": unsafe map file /etc/mail/aliases.db: Permission
denied
WARNING: cannot open alias database /etc/mail/aliases
Cannot create database for alias file /etc/mail/aliases

I know the solution is to change some permissions, but I can't find it
anywhere. A quick answer would surely help.

Thanks.
Craig