Hello!
I noticed that some machines from MS query strange things:
Instead of TXT, they query A for the DKIM stuff.
Internet Protocol Version 6, Src: 2603:1062:0:8f::11
(2603:1062:0:8f::11), Dst: srv1.xxxxx (2a01:xxxxx) User
Datagram Protocol, Src Port: 44268 (44268), Dst Port: domain (53)
Domain Name System (query) Transaction ID: 0x932f Flags: 0x0010
Standard query Questions: 1
Answer RRs: 0
Authority RRs: 0
Additional RRs: 1
Queries
default._domainkey.dorfdsl.de: type A, class IN
Name: default._domainkey.dorfdsl.de
[Name Length: 29]
[Label Count: 4]
Type: A (1) (Host Address)
Class: IN (0x0001)
Additional records
<Root>: type OPT
Name: <Root>
Type: OPT (41)
UDP payload size: 1232
Higher bits in extended RCODE: 0x00
EDNS0 version: 0
Z: 0x8000
1... .... .... .... = DO bit: Accepts DNSSEC security
RRs .000 0000 0000 0000 = Reserved: 0x0000
Data length: 0
[Response In: 13]
Can anybody explain the reason for that?
It might be a machine from a customer in their Azure cloud, so it
doesn't mean it is from MS' machines itself.
default is my DKIM key, so I assume it is the DNS resolver of somebody
who received mail from me/mailing lists.
--
kind regards
Marco
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