What is the reason: Google mail does not recognize the DKIM record as valid?

Question

gmail

Mail gets into GMAIL spam.
I suspect it is for the following reason:

ARC-Authentication-Results: i=1; mx.google.com;
       dkim=temperror (no key for signature) [email protected] header.s=mail.example.com header.b=bk9Cg1Jt;
       spf=pass (google.com: domain of [email protected] designates 1.2.3.4 as permitted sender) [email protected]

Although judging by the tests ( https://spamtest.smtp.bz , https://dkimcore.org/c/keycheck , dig) DKIM is configured correctly, please tell me which way to dig. Maybe something in opendkim is configured incorrectly? Can you throw an example config for: SigningTable, KeyTable ?
UPD:
I figured it out with DKIM: I copied the key incorrectly.
Now the question is: what else could be the problem of getting into spam?
DKIM: PASS
SPF: PASS

Answer 1

Do you have a public key added to the dns zone?

Answer 2

Now the question is: what else could be the problem of getting into spam?
DKIM: PASS
SPF: PASS

For example, previous "spam" emails (with wrong DKIM). Or SPF is not configured.