29 Sep
2010
29 Sep
'10
1:10 p.m.
On 9/29/2010 12:26 PM, N. Yaakov Ziskind wrote:
"I block all SMTP traffic from IPV4 servers (clients?) which have odd numbers in the third octet." might not be a good idea for a high volume mail server with clients, but if it's your network, go for it.
Sadly this method would on average block 97% spam, 3% ham, and statistically be highly effective.