[vPostMaster] commercial server-level spam filtering that works with vpostmaster?

[Wallace Winfrey]

Jonathan Wilson wrote:

> We've been using MessageLabs - works good enough (though pricey).

What's "pricey" ?

Also, how do they work? You just stick one of their servers in your 
primary MX record and then tell them where to send mail after it's been 
filtered?

cheers

w