can nott telnet to port 25

[Ning Wu]

Hi.

I am a newbie of Mail world. I am trying to install Qmail on my Red Hat
box. I installed qmail and can telnet localhost 25 and everything looks
fine.

But when I try to connect from other host.
$telnet myhost 25
trying 24.12.XX.XX...

It just hangs there. I can't figure out what's wrong. I don't have special
settings of TCP Wrapper.

Thanks.

Ning