Update README.md

README.md

@@ -1,96 +1,96 @@
 [Postfix](http://www.postfix.org/) with ldap authentication and [spamassassin](http://spamassassin.apache.org/) + [OpenDKIM](http://www.opendkim.org/) in ldap.
 
-## Volumes
+# Volumes
 - `/etc/ssl/mail:ro`: certificates have to be here.
 
-## Environment Variables
-### MYHOSTNAME
+# Environment Variables
+## MYHOSTNAME
 Fully qualified hostname.
 
-### MYDOMAIN
+## MYDOMAIN
 The internet domain name of the mail system.
 
-### SMTP_BANNER
+## SMTP_BANNER
 Text prepended to `$myhostname ESMTP $mail_name` for the smtp banner.
 
-### DOVECOT_HOST
+## DOVECOT_HOST
 Hostname for the dovecot host.
 
-### DOVECOT_AUTH_PORT
+## DOVECOT_AUTH_PORT
 Port for the dovecot host.
 
-### DKIM_HOST
+## DKIM_HOST
 Hostname for the OpenDkim host.
 
-### DKIM_PORT
+## DKIM_PORT
 Port for the OpenDkim host.
 
-### LMTP_HOST
+## LMTP_HOST
 Hostname for the lmtp host (probably dovecot).
 
-### LMTP_PORT
+## LMTP_PORT
 Port for the lmtp host.
 
-### LDAP_URI
+## LDAP_URI
 Complete uri for the authentication ldap host.
 
-### LDAP_BIND_DN
+## LDAP_BIND_DN
 DN used to authenticate against ldap.
 
-### LDAP_BIND_PASSWORD
+## LDAP_BIND_PASSWORD
 Password used to authenticate against ldap.
 
-### LDAP_ALIAS_QUERY_FILTER
+## LDAP_ALIAS_QUERY_FILTER
 Ldap filter for mail aliases.
 
-### LDAP_DOMAIN_QUERY_FILTER
+## LDAP_DOMAIN_QUERY_FILTER
 Ldap filter for domains.
 
-### LDAP_MAILBOX_QUERY_FILTER
+## LDAP_MAILBOX_QUERY_FILTER
 Ldap filter for mailboxes.
 
-### LDAP_MAILBOX_SEARCH_BASE
+## LDAP_MAILBOX_SEARCH_BASE
 Base DN to look for mailboxes on the ldap host.
 
-### LDAP_DOMAIN_SEARCH_BASE
+## LDAP_DOMAIN_SEARCH_BASE
 Base DN to look for valid domains on the ldap host.
 
-### LDAP_DOMAIN_RESULT_ATTRIBUTE
+## LDAP_DOMAIN_RESULT_ATTRIBUTE
 - default: dc
 
 Ldap attribute that is fetched in the domain query.
 
-### LDAP_MAILBOX_RESULT_ATTRIBUTE
+## LDAP_MAILBOX_RESULT_ATTRIBUTE
 - default: cn
 
 Ldap attribute that is fetched in the mailbox query.
 
-### LDAP_STARTTLS
+## LDAP_STARTTLS
 - default: yes
 
 Whether to use tls when connecting to the ldap host.
 
-### CERTNAME
+## CERT_NAME
 - default: fullchain.pem
 
 Name of the certificate file.
 
-### Keyname
+## KEY_NAME
 - default: privkey.pem
 
 Name of the key file.
 
-### MESSAGE_SIZELIMIT
+## MESSAGE_SIZELIMIT
 - default: 20000000
 
 Message size limit in bytes.
 
-### MAILBOX_SIZELIMIT
+## MAILBOX_SIZELIMIT
 - default: 0
 
 Mailbox size limit in bytes. `0` disables the limit.
 
-### TLS_SECURITY_LEVEL
+## TLS_SECURITY_LEVEL
 - default: may
 
 One of:
@@ -99,26 +99,26 @@ One of:
 - encrypt: Mandatory TLS encryption: announce STARTTLS support to remote SMTP clients, and require that clients use TLS encryption. 
   According to [RFC 2487](http://tools.ietf.org/html/rfc2487) this MUST NOT be applied in case of a publicly-referenced SMTP server.
 
-### TLS_PROTOCOLS
+## TLS_PROTOCOLS
 - default: !SSLv2, !SSLv3
 
 Comma seperated list of accepted TLS protocols.
 
-### TLS_CIPHERS
+## TLS_CIPHERS
 - default: high
 
 The minimum TLS cipher grade that the Postfix SMTP server will use with opportunistic TLS encryption.
 
-### TLS_EXCLUDE_CIPHERS
+## TLS_EXCLUDE_CIPHERS
 - default: aNULL, MD5, 3DES
 
 Comma seperated list of ciphers or cipher types to exclude from the SMTP server cipher list at all TLS security levels.
 
-## Ports
+# Ports
 - 25
 - 587
 
-## Capabilities
+# Capabilities
 - DAC_OVERRIDE
 - NET_BIND_SERVICE
 - SETGID