opendkim-genkey -r -s <tên domain> -d <domain.com>
ví dụ:
opendkim-genkey -r -s myselector -d example.com
- sau khi tạo xong mở file thêm
/etc/opendkim/opendkim.conf
Domain example.com
KeyFile /path/to/keys/server1.private
Selector myselector
Socket inet:8891@localhost
UserID opendkim
- sau đó tạo một DNS TXT
myselector._domainkey IN TXT "v=DKIM1; k=rsa; s=email; p=...................."
- Sau đó kiểm tra
host -t TXT myselector._domainkey.example.com
- sau đó gán cho postfix mở file main.cf
non_smtpd_milters=inet:127.0.0.1:8891
smtpd_milters=inet:127.0.0.1:8891
hoặc
smtp inet n - n - - smtpd
-o smtpd_client_connection_count_limit=10
-o smtpd_milters=inet:127.0.0.1:8891
submission inet n - n - - smtpd
-o smtpd_enforce_tls=no
-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated,reject
-o smtpd_sasl_path=smtpd
-o cyrus_sasl_config_path=/etc/sasl2
-o smtpd_milters=inet:127.0.0.1:8891