[Mailman-Users] no mail to outside users

[DDM COMPUTERS - Danny Moss]

Hi All,

I am hoping somebody can help me before I had a cracker come and crash 
my whole system I had a good working copy of mailman everything worked ..

Now i have fully rebuilt my system with the same copy of mailman on it 
and same redhat 8.0 but noew nobody gets any mail from mailman out side 
of my local lan.

I can subscribe to all the lists in fact everybody it the house on the 
lan can but nobody from the internet gets any mail back they use the web 
interface or just send email they never get anything back..
I can use the web interface or just send email and I get an answer 
straight away any ideas ..
what have I missed ..
thank you for your time to read this message thanks inadvance
Danny moss