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List:       postfix-users
Subject:    Re: Sorry for non-list post
From:       Matus UHLAR - fantomas <uhlar () fantomas ! sk>
Date:       2019-08-22 7:12:01
Message-ID: 20190822071201.GA6148 () fantomas ! sk
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>On 8/21/19 2:21 PM, Wietse Venema wrote:
>> UDP/53 is DNS. There will be a hit each time there is email for you
>> from a Postfix mailing list, with one request that has type MX, and
>> one or more requests that have type A or AAAA.

On 21.08.19 14:50, ghe wrote:
>I get thousands a day from China and Brazil and all over. They aren't
>looking for an IP, they just want to be a significant nuisance. DNS hits
>are by far the most traffic at my little domain.

If you run DNS server and have domain delegated to it, accept the fact that
they will query it.  If not, disable DNS queries from outside.
and, since this is not postfix issue, this should be all said about that.

-- 
Matus UHLAR - fantomas, uhlar@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
LSD will make your ECS screen display 16.7 million colors
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