Fighting SPam

[skiff811]

Currently i have a spam filter in production. THe problem is that some spam senders ingnore my MX records and just send it to my SMTP servers external Ip addres port 25.

Would it be possible to setup so my firewall block all traffic to port 25 except traffic from a defined Ip address?

netscreen newb-

 

[sikek]

All you would need to do is create an address book entry. for the networks you wish to have access the mail server. Then create a policy with those address books

http://ns25-50-support.netscreen.com/knowbase/root/public/ns10091.htm?