[H-GEN] SpamAssassin for secondaries?

[Josh Marshall]

Hi Tony,

> I have spamassassin all working fine for my domain.   I handle secondary MX
> for a few small clients in the event their ADSL goes down, I notice,
> looking at maillog files, they seem to get a lot of spam, even through my
> server when their own is down.  Does spamassassin handle all domains that
> you relay for by default, or is this something I need to specify?

It depends on how you've implemented spamassassin. i.e. when do you scan for 
spam? At local delivery time using e.g. procmail or via a daemon that 
processes the mail as it comes in e.g. amavis?

I personally use amavisd-new which scans mail for both spam and virii and I've 
got it configured with postfix to scan emails as they pass through the MTA - 
that way they are scanned in both directions (stops viruses getting out) and 
it scans emails before sending them on to other MX's.

Regards,
Josh.