diff --git a/docs/src/configuration.md b/docs/src/configuration.md
index d9d5bde..eb68b4c 100644
--- a/docs/src/configuration.md
+++ b/docs/src/configuration.md
@@ -13,19 +13,6 @@ To change the environment variables edit the `.env` file.
 | `BACKEND_API_GRAPHQL_PLAYGROUND`      | `Bool`   | Enables GraphQL playground (automatically enabled when compiled in development mode) |
 | `BACKEND_API_JWT_SECRET`              | `String` | Password to encrypt all authentication tokens with                                   |
 | `BACKEND_API_JWT_EXPIRATION`          | `Int`    | Expiration time of authentication tokens in minutes                                  |
-| `BACKEND_SMTP_HELO`                   | `String` | SMTP server HELO                                                                     |
-| `BACKEND_SMTP_HOST`                   | `String` | SMTP server hostname                                                                 |
-| `BACKEND_SMTP_PORT`                   | `Int`    | SMTP server port                                                                     |
-| `BACKEND_SMTP_NAME`                   | `String` | Name to send emails with                                                             |
-| `BACKEND_SMTP_USERNAME`               | `String` | SMTP account username                                                                |
-| `BACKEND_SMTP_PASSWORD`               | `String` | SMTP account password                                                                |
-| `BACKEND_LDAP_HOST`                   | `String` | LDAP server hostname                                                                 |
-| `BACKEND_LDAP_PORT`                   | `Int`    | LDAP server port                                                                     |
-| `BACKEND_LDAP_BASE_DN`                | `String` | LDAP virtual DN                                                                      |
-| `BACKEND_LDAP_BASE_USER_DN`           | `String` | LDAP user group DN                                                                   |
-| `BACKEND_LDAP_BIND_DN`                | `String` | LDAP admin account DN                                                                |
-| `BACKEND_LDAP_BIND_PASSWORD`          | `String` | LDAP admin account password                                                          |
-| `BACKEND_LDAP_CACHE_REFRESH_INTERVAL` | `Int`    | Periodical cache refresh interval in minutes                                         |
 
 ## Compile time