How to determine who is passing the DKIM key?

Question

Email

tell me where an extra public DKIM key can be transferred.
test for mail-tester:
https://www.mail-tester.com/viso-RHAZ
this is the first time this comes across.

Answer 1

Look at Receiveds to see if your message went through the MTA twice (for example, before and after the spam filter or anti-virus filter), if extra milters are connected in the MTA, if the built-in DKIM functionality is connected in the MTA (there are, for example, in exim).
PS And not an extra public key, but an extra DKIM signature. You don't have a key for the mail selector.

Answer 2

when analyzing the path of 2 letters, I gave out what is in the picture: - And !!!
A) 1 sending from a test template - gives 1 signature without a key mail selector
B) 2 sending from a test letter - gives 2 signatures mail without a key and mailer._domainkey
DKIM with a mail selector - not one domain on all vds has
all mailer._domainkey . and Verifies by mailer._domainkey. selector and gives keys to it.
but in the photo - this is not even a question - I don’t see the sending server [email protected] here is on vds myb2mails.ru
for reference bizmy-mails.ru vds No. 2 with mail wizz software from where everyone commands .. senders
are on vds myb2mails.ru
saw this when I hung 2 domains on 1 ip - each domain has its own dns - Maybe something here? but that darkness is not enough ..
at this moment there was still a change in the dns server - there was a glitch with the cname cache. The signature is not cached, is it?
/// A software glitch is also possible in combination with the above :::)))
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