Connect. Communicate. Collaborate. Securely.

Home » Kerio User Forums » Kerio Connect » DNS blacklist lookup optimization
Iassen Hristov

Messages: 54
Karma: 0
Send a private message to this user
I was trying to minimize the traffic that the KMS SMTP engine generates
when receiving e-mail by looking up the sender's IP address in DNS

I re-ordered the list of DNS blacklist I use like this:

since spamhaus is the one that blocks aprox 70% from all rejected.

To my surprise, the function that checks, does not break the loop when a
positive is discovered. As you can see in the attached log file all 4 lists
are being checked, even though a match is found on the second one and it is
completely unnecessary to check the rest.

1) I am still using KMS 5.7.10. Does anybody know if 6.01 behaves the same?
2) Does Kerio have intention in changing this behavior? I can see no reason
for this.

Iassen Hristov

Messages: 471
Karma: 0
Send a private message to this user
What I would like to see happen is Kerio scrap the concept of blocking any matches on a blacklist, and instead apply scores to the message, depending on which blacklist it matches. This is how SpamAssassin works and is much more flexible.

Kerio MailServer 6.7.1 w/AD
Windows Server 2003 SP 1
Dell PowerEdge 2850 (Dual Xeon 3.2ghz and 2 GB RAM)
~1300 users
~1000+ concurrent IMAPS connections
iPhone users
Outlook 2007 KOFF users
Apple iCal 10.5/10.6 users
Previous Topic: Local caching - Kerio Outlook Connector
Next Topic: Creating Webmail Folders
Goto Forum:

Kerio discussion forums are intended for open communication between forum members and may contain information and material posted by members which may be useful in learning about Kerio products. The discussion forums are not intended to provide technical support for any specific product. Any information implied or expressed in the discussion forums is that of the posting member. Kerio is in no way responsible for the information posted in the forums, or its accuracy. Kerio employees may participate in the discussions, but their postings do not represent an offical position of the company on any issues raised or discussed. Kerio reserves the right to monitor and maintain the forums to promote free and accurate exchange of information.

Current Time: Sun Nov 19 17:20:58 CET 2017

Total time taken to generate the page: 0.00423 seconds
.:: Contact :: Home ::.
Powered by: FUDforum 3.0.4.