Can i configure the postfix for the reciving part only?
And for sending to relay everythig to my exchange smtp?

We have antispam/witelist/graylist etc infront of exchange so there is no need to have it on the iredserver.
So i think the Postfix can be stript hard

But then again i am no Postfix guru

I am now trying to add "mtaTransport: smtp:xxx:25" to transport_maps field. Should i remove all others?
or just add "mtaTransport:  smtp:ip:25"

Edit:
Should the "mtaTransport: smtp:xxx:25" be a own line in "/etc/postfix/main.cf"  or should it go in another file?
Edit2:
Change the mtaTransport in phpLdapadmin for "domain.com"
To "smtp: 192.168.16.220:25"
but still no go

And Thank you for all the replays so far.

It should be something like this:

- For openldap backend, value of attribute 'mtaTransport' should be something like this:

mtaTransport: smtp:xxx:25

- For mysql backend, value of field 'transport' in vmail.domain should be something like this:

smtp:xxx:25

If i use exchanges SMTP all works.
But as i want to use the WebGui as well. (Not only IMAP Clients)

I have to get the postfix to relay everything to the exchange server.

Will try to load the default main.cf back and just do this 3 or 4 changes.
Will post with results after I have done this.

And again thanks for the help.

But adding it to the "Mynetworks" did not work.
We got it working form exchange to IRedMail server but not from The iRed to the Exchange server.

But after adding it to the network i recive another error code.
Task 'ServerName- Sending' reported error (0x8004210B): 'The operation timed out waiting for a response from the sending (SMTP) server. If you continue to receive this message, contact your server administrator or Internet service provider (ISP). The server responded: 454 5.7.3 Client does not have permission to Send As this sender.'

And again thanks for the help.

We are trying to get Shared namespaces working with iRedMail and Exchange 2003.
The exchange front end is configurd after "http://www.msexchange.org/tutorials/Exc … aring.html"
And is relaying to the iRedMail server.

And in the iRedMail server we have added Net::Ldap support.
And with that we generate a list of all admailaddresses.
http://www-personal.umich.edu/~malth/gaptuning/postfix/

In main.cf we have added
"hash:/etc/postfix/adlist" on the "relay_recipient_maps" field.
And in the "relay_domains" i have added "domain.com"

But we only recive "553 5.7.1 <user@domain.com>: Sender address rejected: not logged in"

Do i need to configure anything more in the main.cf?

Any advice will be a greate help.

Cheers WebFooL