DKIM How To

DKIM add new key:

• create keys and put them into /etc/opendkim/keys/domains.com/keys
• add domain to trusted.hosts
• add domain to signing.table
• add domain to key.table

systemctl restart opendkim

Generate keys:

opendkim-genkey -b 2048 -h rsa-sha256 -r -s mail -d domain.com -v

Test Keys:

opendkim-testkey -d domain.com -s mail -vvv

Need permissions:

chown -R opendkim:opendkim /etc/opendkim
chmod go-rw /etc/opendkim/keys

Tools:

• Key Generator
• Online Key Validator