You do not have a DKIM record for SPREAD or you have an incorrect record. You must therefore create a new record in your domain name management interface, with the information available on your SPREAD back-office.
Case #2:
You have a correct and valid DKIM record: you don't telegram thailand viral have to do anything!
spf dkim dmarc configuration dkim ok
If you are not using SPREAD, here are the setup steps for your DKIM:
Generate a DKIM key pair (public and private) for the relevant domain.
Add a TXT record containing the DKIM public key to the domain's DNS settings.
Configure your mail server or email routing service to use the DKIM private key when sending messages.
Verify that your emails are correctly signed with DKIM using an online verification tool.
Step 5 - Configure your DMARC
DMARC is an authentication method designed to block attempts to impersonate domains when sending emails.