hi,

I'm have setup postfix in linux mandrake 10, but when i test it using telnet the follwing appears on the screen:
[root@Trinity RPMS]# telnet 192.168.1.5 25
Trying 192.168.1.5...
Connected to Trinity (192.168.1.5).
Escape character is '^]'

According to tutorial the following text should appear:
[root@localhost root]# telnet 127.0.0.1 25
Trying 127.0.0.1...
Connected to localhost (127.0.0.1).
Escape character is '^]'.
220 localhost ESMTP Postfix (2.1.0-pre-20040209) (Mandrake Linux)

Is there a problem with my postfix setup?

btw postfix daemon is running.

If its working and you can send email then dont worry about it.
Do a nmap scan and make sure that port 25 is open.