diff --git a/README.md b/README.md
index 0ea26a00..fda077a4 100644
--- a/README.md
+++ b/README.md
@@ -104,8 +104,6 @@ Here is a snippet for easy copy paste:
 OIDC_ENABLED=True
 # OpenID Connect provider configuration URL
 OIDC_PROVIDER_INFO_URL=https://<host>:<port>/auth/realms/.well-known/openid-configuration
-# OpenID redirect URL if HOSTNAME not matching your login url
-OIDC_REDIRECT_URL=https://mail.example.com
 # OpenID Connect Client ID for Mailu
 OIDC_CLIENT_ID=<CLIENT_ID>
 # OpenID Connect Client secret for Mailu
diff --git a/core/admin/mailu/configuration.py b/core/admin/mailu/configuration.py
index 015f50af..d567fa02 100644
--- a/core/admin/mailu/configuration.py
+++ b/core/admin/mailu/configuration.py
@@ -57,7 +57,6 @@ DEFAULT_CONFIG = {
     'OIDC_VERIFY_SSL': True,
     'OIDC_CHANGE_PASSWORD_REDIRECT_ENABLED': True,
     'OIDC_CHANGE_PASSWORD_REDIRECT_URL': None,
-    'OIDC_REDIRECT_URL': None,
     'OIDC_USERNAME_CLAIM': 'email',
     'OIDC_USER_DOMAIN': None,
     'OIDC_ENABLE_USER_CREATION': True,
diff --git a/core/admin/mailu/oidc.py b/core/admin/mailu/oidc.py
index df3214c1..1fe53c96 100644
--- a/core/admin/mailu/oidc.py
+++ b/core/admin/mailu/oidc.py
@@ -95,9 +95,7 @@ class OicClient:
 
         redirect_uri = flask.request.host_url + "sso/login"
 
-        if self.app.config["OIDC_REDIRECT_URL"]:
-            redirect_uri = self.app.config["OIDC_REDIRECT_URL"]
-        elif flask.request.host not in self.allowed_hostnames:
+        if flask.request.host not in self.allowed_hostnames:
             return None
 
         args = {