how best to block this port 25 traffic/spam?

[snowcrash]

hi,

> i recommend assp : http://assp.sourceforge.net/
>
> assp = anti-spam smtp proxy
>
> if installed correctly it will sit in front of your smtp-server,
> in my opinion it works awesome, and has lots of options, RBL being one
> of them

now that looks very interesting.  not familiar with it as yet.  thanks!

> beware however... make sure you look at all the option and do not just
> go with all the default examples in the web-interface

understood.

as i'd be running this on a 'small' headless router box, i'm
interested in keeping anything i enable as lean/lightweight as
possible -- which usually menas trimming default options! :-)

thanks again!