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Unfortunately, due to a large number of requests going through our DNS (213.186.33.99) OVH has had to suspend DNS resolution for the following DNSBL:
zen.spamhaus.org
pbl.spamhaus.org
sbl.spamhaus.org
xbl.spamhaus.org
multi.surbl.org
Consequently a request to one of these DNSBL will consistently result as a NXDOMAIN response as of the 25th of February, 2019.
As recommended by the latter, you should prefer using your own DNS resolver to use these services rather than a public DNS provider:
https://www.spamhaus.org/faq/section/DNSBL%20Usage#261
Du fait d'un trop grand nombre de requêtes effectuées au travers de nos DNS (213.186.33.99), OVH se voit contraint de ne plus permettre la résolution DNS vers les DNSBL suivantes:
zen.spamhaus.org
pbl.spamhaus.org
sbl.spamhaus.org
xbl.spamhaus.org
multi.surbl.org
Le code NXDOMAIN sera systématiquement retourné à compter du 25/02/2019.
Comme recommandé par celles-ci, nous vous invitons à utiliser votre propre resolveur DNS pour utiliser leur service:
https://www.spamhaus.org/faq/section/DNSBL%20Usage#261