Ubuntu Server, Exim4 and Spam Lists

Question

I have a Ubuntu Server with Exim4 MTA. Everything is running OK. I must integrate Spam Lists, in Exim4. How can I integrate Spam Lists with Exim4?

One of the Spam List i want to integrate is from Spamhaus.

Answer 1

Ok, I just figured out, how it can work.

Edit the file:

vim /etc/exim4/conf.d/main/02_exim4-config_options

Insert the following in bottom of the file:

# Spamhaus RBL zen.spamhaus.org
CHECK_RCPT_IP_DNSBLS = zen.spamhaus.org

Edit the file:

vim  /etc/exim4/conf.d/acl/30_exim4-config_check_rcpt

Search for:

CHECK_RCPT_IP_DNSBLS

Then change, "warn" to "deny" as shown below:

# Check against classic DNS "black" lists (DNSBLs) which list
# sender IP addresses
.ifdef CHECK_RCPT_IP_DNSBLS
deny
message = X-Warning: $sender_host_address is listed at $dnslist_domain ($dnslist_value: $dnslist_text)
log_message = $sender_host_address is listed at $dnslist_domain ($dnslist_value: $dnslist_text)
dnslists = CHECK_RCPT_IP_DNSBLS
.endif

We must restart Exim:

/etc/init.d/exim4 restart

To test this configuration and see if the PBL blocking is working by sending an email (any email) to: nelson-pbl-test@crynwr.com

The system will answer, to tell if your server is correctly blocking PBL-listed IP addresses or not.