Hey all. What's the most effective method of blocking a troublesome domain. This particular domain, wallertruck.com, spams my server with hundreds of infected emails daily. I use Symantec Mail Security and it's catching and deleting them just fine however I just don't want to see any email from this domain. So, on the SMTP Virtual Server I've added the domain name to my servers exclusion list. Since reverse lookup is required it does seem to task the processor. Any other methods? I'm using a NetGear FVL 328 VPN firewall. Thanks all