I am Jagsler colleague, and taken over this project.
I have fixed to most things, like i can send to any @domein.com, and can recieve e-mail of any user.
The last problem where i am stuck on is that i can not send e-mails to our Exchange server.
Because its searching for a MX record but instead of searching on the Internet its searches, on the local Network.
How can fix that postfix search on the web for the MX record instead of on the internal network?
Thanks in advance.