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Exchange 2016 RBL not updated RRS feed

  • Question

  • Hi all,

    we have problems with RBLs like zen.spamhaus.org, its not refreshed in real time, if i check it on server i get Matched: False, but online on website its black listed, so we get a lot of spam because its accepted by our server. Any solution how we can fix that, maybe any refresh rate ?

    Any help would be greatly appreciated!!

    Thanks,

    Milam112

    Thursday, September 5, 2019 7:59 AM

All replies

  • Hi Milam112,

    Spamhaus has made a explanation for this issue, in most cases your DNS servers forwarded requests to public DNS server. Unfortunately Spamhaus ignores the queries coming from this DNS server. Change to a different DNS server and it will work instantly.

    =================================

    Your DNSBL blocks nothing at all!

    First, check our FAQ answer for "Your DNSBL blocks the whole Internet!" and make sure you've not made a spelling mistake in your mailserver configuration.

    Check what DNS resolvers you are using: If you are using a free "open DNS resolver" service such as the Google Public DNS (8.8.8.8) and others (eg. Alternate DNS, Comodo Secure, DNS.Watch, DynDNS, FreeDNS, Hurricane, NeuStar DNS Advantage, Norton ConnectSafe, OpenNIC, Puncat, Quad9, SafeDNS, Uncensored, Verisign, Yandex.DNS), or large cloud/outsourced public DNS servers, such as Level3's, Verizon's or AT&T's to resolve your DNSBL requests, in most cases you will receive a "not listed" (NXDOMAIN) reply from Spamhaus' public DNSBL servers. We recommend using your own DNS servers when doing DNSBL queries to Spamhaus. If this is not possible, contact us for other options.

    =================================

    Reference link: 
    https://www.spamhaus.org/faq/section/DNSBL%2520Usage#261
    https://social.technet.microsoft.com/Forums/azure/en-US/1252eb3d-949c-4cc3-a1d7-dc08f0bdd372/rbl-not-working-on-exchange-2013-edge-transport?forum=exchangesvrsecuremessaging

    Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.

    Regards, 

    Manu Meng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    • Edited by Manu Meng Friday, September 6, 2019 4:17 AM
    Friday, September 6, 2019 4:16 AM
  • Hi!

    thank you for reply, will look at this.

    Regards, 

    Milam112

    Friday, September 6, 2019 9:39 AM
  • Hi!

    thank you for reply, will look at this.

    Regards, 

    Milam112

    Feel free to let me know if you have any questions.

    Regards,

    Manu Meng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Monday, September 9, 2019 1:54 AM
  • Just checking in to see if above information was helpful. Please let us know if you would like further assistance.

    Regards, 

    Manu Meng


    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact tnsf@microsoft.com.

    Friday, September 13, 2019 10:13 AM