How to encrypt Postfix easily?
Just add the following rules at the end of the config file /etc/postfix/main.cf:
# SSL/TLS parameters smtpd_tls_cert_file=/path/to/your/certificate smtpd_tls_CAfile=/path/to/your/bundle smtpd_tls_key_file=/path/to/your/keyfile smtpd_use_tls=yes smtpd_tls_auth_only = yes smtp_tls_security_level = may smtpd_tls_security_level = may # For TLS Logging uncomment the following #smtp_tls_loglevel = 1
Now restart postfix and monitor your maillog.
# service postfix restart
or
# /etc/init.d/postfix restart