You can configure MS Exchange to use Postfix as your default outgoing mail
server. In version 5.5, it's labeled as "Send all mails to host" in the
tab "Connections" of your Internet Mail Service Connector.
To redirect all mails from the Internet to your Postfix box, you need to
modify the MX record of your domain to point to that box and block all
direct SMTP traffic to the Exchange box on the firewall. On the Postfix
box, you can then do the filtering, virus scanning, etc. before sending it
to the Exchange box.
You need to use transport tables to make Postfix forward the mails after
processing:
/etc/postfix/main.cf:
transport_maps = hash:$config_directory/transport
You have to put something like this in Postfix's transport table:
/etc/postfix/transport:
yourdomain.com smtp:yourexchange.server.com
-----Original Message-----
From: Ruel Masil [mailto:[EMAIL PROTECTED]
Sent: Tuesday, June 03, 2003 10:47 AM
To: [EMAIL PROTECTED]
Sirs,
I have to 2 mail servers(Sendmail and Exchange). The Exchange is on the
LAN
side of the firewall and the Sendmail is on the DMZ side of the firewall.
I'm planning to make a Postfix mail relayer which will relay/scan all my
mails first then forward the mail on the right server. I have read some
documents about this but it suggested that I should copy all users both
servers. I also read some documents about running sendmail as mail relay
and
it does not recommend anything about copying users.
Do you have any notes regarding this configuration or any web links were i
can read. Thanks uli.
Bulatitoy :)
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