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It sounds like you do have it setup correctly. I believe you just put your spamhaus URL into the form under "Mail Server Settings:DNS zones for DNSBL service" and submit. Obviously, make sure the checkbox to use DNSBL is ticked "on". That's how it used to work anyway.
Apparantly, what's...
About 2 months ago, the DNSBL stopped working and
email accounts began getting "normal" SPAM floods.
Turning the DNSBL on/off seems to make zero difference.
Results from testing an RBL server more direcly seem okay:
[root@www ~]# dig +short 2.0.0.127.zen.spamhaus.org
127.0.0.4...
Thanks for the feedback VinnyT (your site is now bookmarked for the decision makers around here).
So far, I plan to keep using ipfilter rule(s) to block any such attack attempts. Unfortunately, we're "not allowed" to block the IP address of our PCI scanner's server, but I could send'em the...
For over 6 months now, PCI scanners have been failing us for being vulnerable (via Qmail and Courier IMAP only --> other daemons ok) with regards to the following issue...
SSL renegotiation DoS CVE-2011-1473 which is very similar to CVE-2011-5094. Both of these also say they're *DISPUTED*...
Add one more to the pot - suspect same issue
Some clients are experiencing this: when DNSBL is enabled, they can no longer use SMTP. Server drops the connection before the attempts are even logged.
I tried the "mailmng.zip" quick fix for Debian but it caused some Exceptions on the mail...