Can post from thunderbird but not from telnet or php

[Samer Bechara]

Hello,
I am able to post a message to inn 2.4.3 from within thunderbird, but I am
not able to post from telnet nor from a local php script .
When I type: telnet localhost 119 I am able to connect,
but when I send POST command I get an error "Permission Denied"
The same applies for my php script.
What could be the cause?
Thank you.