exim problem?

[Eric R Cheney <cheney@soc.umass.edu>]

Hello.  I have exim set up at home.  Problem is that I can't e-mail
directly to my box from a host external to the network.  I can fetch mail 
using fetchmail from outside the network, but that's it.  When I try to 
e-mail from an external host to the box, I eventually get a message 
saying "failed MX lookup". 

I can get other network trafic through though, such as ftp and http.  
I have a dsl/router that forwards stuff to the box I want it to....I have 
it forwarding port 25 stuff to the box I can't e-mail to.  

Any ideas what is wrong?

--
Eric Cheney
cheney@soc.umass.edu