diff --git a/README.md b/README.md
index a3eab3b..2379e42 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
-# eintopf-radar-sync
-Small script to sync events of an radar.quad.net group to a specific Eintopf
-instance.
+# mail-quota-warning
+
+Small script to check a configured list of IMAP accounts for mailbox quota and send
+a warning mail in case a specific threashold is exceeded.
 
 ## Installation
 
@@ -11,7 +12,7 @@ Add the module to your `flake.nix`:
 ```nix
 {
   inputs = {
-    eintopf-radar-sync.url = "git+https://git.project-insanity.org/onny/eintopf-radar-sync.git";
+    mail-quota-warning.url = "git+https://git.project-insanity.org/onny/mail-quota-warning.git";
     [...]
   };
 
@@ -21,12 +22,12 @@ Add the module to your `flake.nix`:
       system = "x86_64-linux";
       specialArgs.inputs = inputs;
       modules = [
-        inputs.eintopf-radar-sync.nixosModule
+        inputs.mail-quota-warning.nixosModule
 
         ({ pkgs, ... }:{
 
           nixpkgs.overlays = [
-            inputs.eintopf-radar-sync.overlay
+            inputs.mail-quota-warning.overlay
           ];
 
         })
@@ -42,30 +43,26 @@ Add the module to your `flake.nix`:
 Add this to your `configuration.nix` file
 
 ```nix
-environment.etc."eintopf-radar-sync-secrets".text = ''
+environment.etc."eintopf-radar-sync-secrets.yml".text = ''
 EINTOPF_AUTHORIZATION_TOKEN=foobar23
 '';
 
-services.eintopf-radar-sync = {
+services.mail-quota-warning = {
   enable = true;
   settings = {
     EINTOPF_URL = "https://karlsunruh.eintopf.info";
     RADAR_GROUP_ID = "436012";
   };
-  secrets = [ /etc/eintopf-radar-sync-secrets ];
+  secrets = [ /etc/mail-quota-warning-secrets.yml ];
 };
 ```
 
 Replace setting variables according to your setup.
 
-Get the authorization token through login request in the Eintopf
-Swagger api interface, for example
-https://karlsunruh.project-insanity.org/api/v1/swagger#/auth/login
-
 ### From source
 
 ```
-cd eintopf-radar-sync
+cd mail-quota-warning
 nix develop
 export EINTOPF_URL = "https://karlsunruh.eintopf.info"
 export EINTOPF_AUTHORIZATION_TOKEN = "secret key"
diff --git a/config.yml.example b/config.yml.example
index dfc6526..9b3f4ff 100644
--- a/config.yml.example
+++ b/config.yml.example
@@ -1,5 +1,6 @@
 check_interval_days: 7   # Minimum days between warnings for same account
 quota_warning_threshold_percent: 80
+working_dir: /var/lib/mail-quota-warning
 
 accounts:
   - name: Sales
diff --git a/mail-quota-warning.py b/mail-quota-warning.py
index 8843d74..5b2eea3 100644
--- a/mail-quota-warning.py
+++ b/mail-quota-warning.py
@@ -5,30 +5,55 @@ import yaml
 import json
 import os
 import threading
+import argparse
 from email.mime.text import MIMEText
 from datetime import datetime, timedelta
 
 CONFIG_FILE = "config.yml"
 STATE_FILE = "quota_state.json"
 
-# TODO:
-# - make working dir configurable for state file
-# - optional read config.yml from command line argument
-# - note in warning mail that it exceeded XX% quota threashold
-# - fix list summary mark all accounts which are critical
+# TODO
+# - load config from file
+# - override with env vars
 
-def load_config():
-    with open(CONFIG_FILE, "r") as f:
+def get_config_value(config, env_var, config_key, default_value, value_type=int):
+    """Get configuration value from environment variable or config file, with fallback to default"""
+    env_value = os.environ.get(env_var)
+    if env_value is not None:
+        try:
+            return value_type(env_value)
+        except ValueError:
+            log(f"Invalid value for {env_var}: {env_value}, using config/default")
+    
+    return config.get(config_key, default_value)
+
+def parse_args():
+    parser = argparse.ArgumentParser(description="Email quota monitoring script")
+    parser.add_argument(
+        "--config", 
+        default="config.yml",
+        help="Path to config.yml file (default: config.yml in current directory)"
+    )
+    return parser.parse_args()
+
+def load_config(config_file):
+    if not os.path.exists(config_file):
+        log(f"Config file not found: {config_file}")
+        raise FileNotFoundError(f"Config file not found: {config_file}")
+    
+    with open(config_file, "r") as f:
         return yaml.safe_load(f)
 
 def load_state():
-    if os.path.exists(STATE_FILE):
-        with open(STATE_FILE, "r") as f:
+    state_file = "quota_state.json"
+    if os.path.exists(state_file):
+        with open(state_file, "r") as f:
             return json.load(f)
     return {}
 
 def save_state(state):
-    with open(STATE_FILE, "w") as f:
+    state_file = "quota_state.json"
+    with open(state_file, "w") as f:
         json.dump(state, f, indent=2)
 
 def log(msg):
@@ -235,7 +260,8 @@ def check_account_quota(account, config, state, threshold, interval_days):
     return None, quota_info
 
 def main():
-    config = load_config()
+    args = parse_args()
+    config = load_config(args.config)
     state = load_state()
     interval_days = config.get("check_interval_days", 7)
     threshold = config.get("quota_warning_threshold_percent", 80)
diff --git a/module.nix b/module.nix
index 375b462..1ae4fb4 100644
--- a/module.nix
+++ b/module.nix
@@ -21,14 +21,14 @@ in
           type = lib.types.submodule {
             freeformType = with lib.types; attrsOf types.str;
             options = {
-              EINTOPF_URL = lib.mkOption {
+              CHECK_INTERVAL_DAYS = lib.mkOption {
                 default = "";
                 type = lib.types.str;
                 description = ''
 		  Base URL of the target Eintopf host.
                 '';
               };
-              RADAR_GROUP_ID = lib.mkOption {
+              QUOTA_WARNING_THRESHOLD_PERCENT = lib.mkOption {
                 default = "";
                 type = lib.types.str;
                 description = ''
@@ -49,7 +49,7 @@ in
           '';
         };
 
-        secrets = lib.mkOption {
+        secretFile = lib.mkOption {
           type = with lib.types; listOf path;
           description = ''
             A list of files containing the various secrets. Should be in the