Postfix Users (and Outlook users)

[Peter Russell]

Postfix:
I was hoping that since there is so many Postfix users using MS we could 
get an updated discussion on what everyone is doing at the MTA level 
with regards to
a) stopping spam at the MTA
b) 3rd party anti spam defences - greylisting?
c) specific configs - like the example in the wiki - a dual postfix 
instance that splits multi recipients messages
d) tip and tricks - what have you added to your config that you think 
could benefit others.

I will happily collate the discussion and add it to the wiki.

The reason i am asking is because we are receiving so much more spam, so 
many more complaints from users and i want to consider some of the 
options available at the MTA - eg a postfix version of greet-pause 
sounds good because i dont think we could go for greylisting, at least 
not at the minute.

Outlook:
Also we have always stopped low spam on the server, but the business is 
asking us to deliver it with a modified subject. All of our users are 
outlook users - does any one have any experience with delivering this 
mail, creating a global rule to deliver anything with [SPAM] in the 
subject to Junk mail and letting users use Junk mail controls to handle 
it? Relying on users to create rules etc is not an option, a lot of them 
are academics.

Many thanks and regards
Pete