hi

I have a serious problem:

I'm using postfix:

# rpm -qa | grep postfix
postfix-2.0.6-8
amavis-postfix-0.3.12pre8-210

on SuSE 8.2

this linux server ns.internal.net is behind
a firewall on the internal (trusted network)
running only with the internal domain:
internal.net without MX records.

at the internal network I have also
MS Exchange 5.5 Mail Server.
Exchange is getting and sending all mails
with a really existing internet domain: external.net

postfix is working, but I can't send mails
from linux, because some mail servers don't accept mails from the server with the internal domain.
and I can NOT send any mails to our Exchange.
I need postfix to send newsletters and for some perl scripts.

any idea ?

kind regards
cccc