It's been a long time since I have participated in this list (goes to
show how good Postfiix is when it can run for years with so few
problems). Our company has decided to start using an outside SPAM
filtering service. Overall, this is doing a very good job. But we are
getting SPAM directly into out system and I need to block all outside
SMTP connections except the connections from a group of 8 IP address'.
CIDR notation: 199.89.0.0/21
Netmask notation: 199.89.0.0 with a netmask of 255.255.248.0
Address range: 199.89.0.0 through 199.89.7.255
I tried (from "Getting selective with SMTP access restriction lists" web
page)
smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination
mynetworks = 127.0.0.0/8, 192.168.1.0/24, 199.89.0.0/21
But that only solved half the problem. Mail is still getting in from
from IP's (like from 203.200.235.214 by 125.160.50.143)
Can anyone offer a suggestion how to fix this problem the right way?
Keith Steensma
