forward mail from ispcp to exchange

[kilburn]

This is because postfix still thinks that the domains are locally managed, so it tries to deliver them to local mailboxes that doesn't exist.

If *all* your domains are handled by the exchange server, the easiest thing to do involves some configuration changes in "/etc/postfix/main.cf". Basically, you want to comment out the "virtual_mailbox_domains" and "virtual_mailbox_maps" directives and restart postfix.

Notice that these changes tell postfix that ALL the domains setup by ispcp are handled externally, so it's not a good option if you have some domains for which the server should handle their mails...