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Re: DNSBL: SPAMHAUS spike
Question asked by Hemen Shah - 9/9/2016 at 1:04 PM
Unanswered
Hi,
 
Have recently upgraded to SM 15.x
Anyone seeing spike in below as high as 8000-10000ms
pbl.spamhaus - 127.0.0.10
sbl.spamhaus - 127.0.0.2
xbl.spamhaus - 127.0.0.4
 
Thanks in advance
 
 
 
 
 

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Employee Replied
9/9/2016 at 2:50 PM
Employee Post
Hi Hemen.  I just checked all three of these RBL's on one of our servers, and I'm not seeing any delays.  I would try switching your DNS at Settings >> General Settings to Google's 8.8.8.8 / 8.8.4.4.
Afterwards, stop/start the SmarterMail service and then see if the response times improve.  I hope this helps.
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Hemen Shah Replied
9/10/2016 at 5:02 AM
Hi Rod,
I have set above, ideally how much time it should take to come down to normal ? and is it OK to use above DNS for regular use
I usually keep it blank so as to take from network automatically.

Thanks
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Hemen Shah Replied
9/11/2016 at 8:06 AM
I tried by changing the DNS but again still same issue all 3 SBL, PBL, XBL shows around 14000 ms with alert Attention needed
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CCC Replied
9/13/2016 at 10:52 AM
Keep in mind that you might get false positives and/or timeouts when you use public DNS servers for RBL lookups.

Bruce touches upon it in more detail here: http://portal.smartertools.com/community/a444/smartermail-antispam-settings-document-updated.aspx
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Hemen Shah Replied
9/13/2016 at 11:09 AM
Thanks for the same, but either i use google dns or mine still lookup to SBL, PBL, XBL is high is 12000-14000, what could be the issue here !!
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Hemen Shah Replied
9/13/2016 at 12:09 PM
Hi Rod,
 
tried by changing the DNS but again still same issue all 3 SBL, PBL, XBL shows around 14000 ms with alert Attention needed, i tried restarting the services  but still the same pattern.
 
Thanks
0
Hemen Shah Replied
9/13/2016 at 12:11 PM
To note that i am using Antimalware from Malwarebytes which keeps blocking unwanted dns queries too, not sure if this has to do anything with it.
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CCC Replied
9/13/2016 at 12:14 PM
Those 3 all come from SpamHaus, perhaps you have exceeded their free DNSBL usage limit and they are throttling requests from your DNS server?

https://www.spamhaus.org/organization/dnsblusage/

We signed up for CommTouch a few years ago and that has made RBL management mostly a thing of the past for us. I believe SmarterMail used to offer a 30 day trial if you want to measure its effectiveness.
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