Hello again. About one month later I decided to make a clean Debian 6 install.
This time I did'nt do much modification to the system. Only installed OS and
ehcp control panel.
But the new installation suffers the same problem, I cannot send mail ( no
route to host error). Before clean install I can send mail connectiong to the
server with a client machine using Icedove. From now on I cannot send from
local server nor relaying from outside clients.
The ISP still claims they are not blocking any port. Any help would be
apprecriated. Thanks :)