I set up dkim, but the key is not inserted into the letter. What to do?

Question

Mail server

I set up dkim, but the key is not inserted into the letter.
Here are the settings

PidFile /var/run/opendkim/opendkim.pid
Mode    sv
Syslog  yes
SyslogSuccess   yes
LogWhy  yes
UserID  opendkim:opendkim
Socket  inet:[email protected]
Umask   002
SendReports     yes
SoftwareHeader  yes
Canonicalization        relaxed/relaxed
Selector        default
MinimumKeyBits  1024
KeyTable file:/etc/postfix/dkim/keytable
SigningTable file:/etc/postfix/dkim/signingtable
OversignHeaders From

Only the
DKIM-Filter version comes in the header: OpenDKIM Filter v2.11.0 hostname.localdomain
Thank you for your attention!

Answer 1

I can judge by the title, do you expect the public key to be in the letter? This is not the case, you must publish the public key in DNS in a TXT record. Then the recipient's server will be able to decrypt the content encrypted with your private key on the server.