OpenBSD's spamd.

[Christopher Hilton]

Peter Matulis wrote:

[ snip ]

>  my secondary MX is a FreeBSD box with no such protection and I fear
>> that 
>> the spammers will just take advantage of the fact that my secondary
>> MX 
>> has weaker protections than my primary.
> 
> Yes, best practice is to configure all MX servers in the same way. 
> Especially so if you plan to give spam servers a punch in the face
> (stuttering, greylisting, etc).  I am also interested in spamd but will
> not use it because I do not have control of the other mailservers.
> 
> 

Well, I found out the hard way. I configured my primary mailserver to 
use a few of the less political rbls and found that the spammers adapted 
by hitting my secondary MX....

-- Chris