[lug] postfix "policy" question

[Lee Woodworth]

Chip Atkinson wrote:
> Thanks so much!  The one thing that I was missing, 
> greylist unix - n n - - spawn 
> where "greylist" replace the word "policy" is the key/answer to the
> problem that I was having.
What isn't obvious in master.cf, is that the service "names" are either 
unix socket file names or internet port numbers. For unix services, the 
private/public setting determines whether the socket is in 
/var/spool/postfix/{public,private}. For inet services, the name is the 
port the service listens on.

> It wasn't clear how to have more than one filter in place.
> 
> On a similar topic, does anyone have any favorite books on postfix?
> I see that O'Reilly has one, but one of the reviews was rather poor.
Do you mean: Postfix: the Defintive Guide, Kyle Dent, 2004? I have it, 
and think it is a pretty good introduction to the system. Doesn't cover 
some of the new features since 2.1. The poor review may be more due to 
postfix's config parameters not being as orthogonal as they could be.