diff --git a/README.md b/README.md
index 4566c94..f2bda7b 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[Postfix](http://www.postfix.org/) with ldap authentication and [spamassassin](http://spamassassin.apache.org/) + [OpenDKIM](http://www.opendkim.org/) in ldap.
+[Postfix](http://www.postfix.org/) with dovecot authentication and [spamassassin](http://spamassassin.apache.org/) + [OpenDKIM](http://www.opendkim.org/) in postgres.
 
 # Volumes
 - `/etc/ssl/mail:ro`: certificates have to be here.
@@ -34,50 +34,29 @@ Hostname for the lmtp host (probably dovecot).
 ## LMTP_PORT
 Port for the lmtp host.
 
-## LDAP_URI
-Complete uri for the authentication ldap host.
-
-## LDAP_BIND_DN
-DN used to authenticate against ldap.
-
-## LDAP_BIND_PASSWORD
-Password used to authenticate against ldap.
-
-## LDAP_ALIAS_QUERY_FILTER
-Ldap filter for mail aliases.
-
-## LDAP_DOMAIN_QUERY_FILTER
-Ldap filter for domains.
-
-## LDAP_MAILBOX_QUERY_FILTER
-Ldap filter for mailboxes.
-
-## LDAP_MAILBOX_SEARCH_BASE
-Base DN to look for mailboxes on the ldap host.
-
-## LDAP_DOMAIN_SEARCH_BASE
-Base DN to look for valid domains on the ldap host.
-
-## LDAP_DOMAIN_RESULT_ATTRIBUTE
-- default: dc
-
-Ldap attribute that is fetched in the domain query.
-
-## LDAP_MAILBOX_RESULT_ATTRIBUTE
-- default: cn
-
-Ldap attribute that is fetched in the mailbox query.
-
-## LDAP_STARTTLS
-- default: yes
-
-Whether to use tls when connecting to the ldap host.
-
 ## CERT_DOMAIN
 Name of the certificate domain.
 
 Name of the key file.
 
+## DB_HOST
+
+Postgre database host.
+
+## DB_USER
+- default: email
+
+User to connect to the database.
+
+## DB_PASSWORD
+
+Password to use for the database user.
+
+## DB_NAME
+- default: email
+
+Name of the postgre database to connect to.
+
 ## MESSAGE_SIZELIMIT
 - default: 20000000