I have a Linux mail server and a Mac running OS 10. The Mac default mail client pops and sends mail perfectly!!! but now ive install Office for MAC 2004 and Microsoft Entourage doesnt work at all!!! Can anyone help me!?

I have opened the firewall on my linux box for all protocols and ports for the macs ip address!

so it cant be a firewall issue!

i got samba on my linux box as well and the mac works fine with it.

im lost!!!