Postfix/Cyrus/etc help

[Neil Schelly]

I'm looking for some book reviews I think.  I'm trying to setup a 
Postfix/Cyrus mail server that will use SpamAssassin, Amavisd, virtual 
domains, LDAP, etc.  I'm familiar with all the parts of this except Postfix 
and Cyrus already and I'm just wading through the documentation of Postfix 
and/or Cyrus trying to make sense of a lot of it.

It could be that I'm a little dense sometimes, but it seems a lot of this 
documentation is very example-based, but if the example doesn't match your 
goal, it's not very helpful.  I find myself jumping from one how-to to 
another in the documentation for each rather than finding a good single 
resource for reference information on each.

I'm wondering if anyone else has particular experience with these tools and 
can recommend a good source for this information.  For example, is the 
O'Reilly book on Postfix a good start? I know it doesn't really cover Cyrus, 
but I'm honestly having more trouble figuring out the Postfix half here since 
it has to incorporate all these other things.

For some perspective, I've always been more of an Exim guy here since it just 
comes with Debian and has always satisfied my needs just fine, but I've been 
thinking that from all I've read, Postfix might be a better choice given all 
the distinct technologies I'm trying to tie together.  Maybe I'm wrong and 
I'd love to hear that too should that be the case ;-)
-Neil