[Nottingham] iptables SMTP blocklist

[Michael]

Mike Cardwell wrote:

> Nope, I don't, but if you want to block them and you know the IP range,
> it's a simple:
> 
> iptables -I INPUT -s xxx.xxx.xxx.xxx/xx -p tcp --syn -j DROP

Thanks folks - what I should have asked is: do any of you block 
particular ranges or make use of RBL/other services? This is for my 
Devil-Linux firewalls at home and at work - I get many relay attempts on 
both SMTP servers.

Regards,

Michael.