Add Readme 'force-ssl' and 'diasble smtp-auth on port 25'.

README.disable-smpt-auth-25

@@ -0,0 +1,6 @@
+
+/etc/postfix/master.cf :
+
+   smtp       inet  n       -       y       -       -       smtpd
+      ..
+      -o smtpd_sasl_auth_enable=no

README.force-ssl

@@ -0,0 +1,22 @@
+
+/etc/postfix/main.cf :
+
+   ## -  Only offer SMTP AUTH when talking over an encrypted connection
+   smtpd_tls_auth_only = yes
+
+
+/usr/local/dovecot/etc/dovecot/conf.d/10-ssl.conf :
+
+   # SSL/TLS support: yes, no, required. <doc/wiki/SSL.txt>
+   #ssl = yes
+   ssl = required
+
+
+/usr/local/dovecot/etc/dovecot/conf.d/10-auth.conf :
+
+   # Space separated list of wanted authentication mechanisms:
+   #   plain login digest-md5 cram-md5 ntlm rpa apop anonymous gssapi otp skey
+   #   gss-spnego
+   # NOTE: See also disable_plaintext_auth setting.
+   ## auth_mechanisms = plain
+   auth_mechanisms = plain login