exim does not work with ppp

[Aryan Ameri <a.ameri@linuxiran.org>]

hi there:

I recently setup exim, to get rid of sending emails using SMTP. however, my 
exim is acting very stragely, when I come to office, and connect my notebook 
computer to our corporate LAN (using eth0) exim is able to send messages 
perfectly. but when I get home, and establish a ppp connection (using kppp) 
to my ISP, the messages just sit there, "exim -bp" shows me that the messages 
are still there, and even "exim -qf" isn't able to send them. It seems to me 
that exim can't underestand that I am connected to the internet, when I use 
ppp.

Any ideas? 
-- 
"Dismiss the weak and inferior, embrace the 
 Evil and Possess your Box  before the beast 
 that has been unleashed upon you"
                        -UNDEAD EvilEntity Linux

Aryan