You should only have these entries in your hosts file
Code:
127.0.0.1 localhost.localdomain localhost
192.168.169.33 mail.tvi.cl mail
I'd also suggest you disable ipv6 on this server.
BTW, I missed the fact you had this in your hosts file:
Code:
127.0.0.1 localhost.localdomain localdomain
which is incorrect, it should be what I've posted above.