FC3: problems with Sendmail

[Fabiano Petrone]

hello,
I've a small LAN with a fedora core 3 (a machine called fedora3,
192.168.0.50, sendmail 8.13.1.2, dovecot 
0.99.13-3) and a windows 2000 (a machine called zenone, 192.168.0.20)
I've not still configured DNS on fedora, but I've so edited /etc/hosts:

127.0.0.1	localhost localhost.localdomain
192.168.0.50	fedora3
192.168.0.20	zenone

I've made the same on windows and the 2 commands:

ping zenone
ping fedora3

works perfectly in both directions.

For the sendmail side, I've made the following changes on the /etc/mail files:

-added fedora3 on local-host-names
-dnl # DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl   in
sendmail.mc

reloaded the daemon, the telnet fedora3 (and localhost) on port 25 & 110 
(sendmail & dovecot)  is OK  but sendmail daemon  is really slow starting.
giving the command

newaliases

from the shell sendmail tells me:

WARNING: local host name (fedora3) is not qualified; see cf/README: WHO AM I?

I've seen the README file (chapter  WHO AM I?) but I've not understood good
the explication: what should I add to (I think) my sendmail.mc file?

thanks a lot in advance for your help,

fabiano