$Id: README.postfix,v 1.1 2004/10/24 21:25:35 jonz Exp $

POSTFIX INTEGRATION

Please follow the instructions in the README for building DSPAM. Once DSPAM
has been built, the following instructions may be used to integrate it with
postfix.

Postfix can be configured to integrate with DSPAM, however you'll need to use
a separate delivery agent for final delivery to your mailbox.  Two good LDAs 
to use for this purpose are Procmail and Maildrop. The first step in getting 
DSPAM to work is to get mail delivery to work with one of these external LDAs
before integrating DSPAM with postfix.

Procmail is pretty standard on most Linux distributions. It works fine for 
delivery to local users, but if you need to support virtual users (email 
accounts that do not correspond to a local Unix user), it can be difficult to 
figure out how to get Procmail to deliver to the right place.

You can configure DSPAM with the appropriate LDA using --with-delivery-agent=
at configure time or by specifying TrustedDeliveryAgent in dspam.conf. 
For example:

TrustedDeliveryAgent "/usr/bin/procmail" 

You'll also want to configure the untrusted delivery agent in a similar
fashion:

UntrustedDeliveryAgent "/usr/bin/procmail -d %u"

If you are using maildrop, you'll need to be sure you've compiled maildrop to
trust the user that dspam is running as.

Once you have configured a local delivery agent into DSPAM, the simplest way 
to configure postfix for local users is to set the mailbox_command directive 
to point to DSPAM. This can be done by editing /etc/postfix/main.cf:

mailbox_command = /usr/local/bin/dspam --deliver=innocent --user $USER -d %u

Now, configure the aliases as prescribed in the README and you're good to go!

CYRUS INTEGRATION

If you're using Cyrus to deliver mail locally, you'll want to specify the
following in dspam.conf:

TrustedDeliveryAgent "/usr/sbin/cyrdeliver $u"

Then use the following in Postfix:

mailbox_command = /usr/local/bin/dspam --user ${user} --deliver=innocent

