mail error message

[Jeff Daigle]

Hello, I tried to send a test mail by typing:
mailx -s "test mail" myemail@mycompany.com
The mail did not go through and I got this error message:
dbm map "Alias0": unsafe map file /etc/aliases

Can anyone help me understand what this means or where I can go to learn what error this is? Thanks in advance! Jeff

[Christopher Caldwell]

Make sure the dirs /etc/ and /etc/mail are not group writable (should be 755). Make sure your aliases/virtusertable/other dbs are not group writable (should be 644).