Minimum TTL?

Reindl Harald h.reindl at
Thu Feb 8 11:32:35 UTC 2018

Am 08.02.2018 um 12:30 schrieb Michelle Konzack:
> Hello Harald,
> Am 2018-02-08 hackte Reindl Harald in die Tasten:
>> you miss the topic
>> many DNSBL's have a very short TTL and at the same time a limit of
>> queries froma single IP until you need to pay for the service
>> so if you have a inbound MX and the RBL has 2 seconds TTL and a botnet
>> is trying to deliver spam to you override the 2 scodn TTL with 90
>> seconds or whatever makes sense reduces the total amount of DNS requests
>> dramatically
> Sounds logic.
> And this feature was rejected by the Bind Developers?

i remember a response pointing out it would violate RFC's

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