diff --git a/data/conf/dovecot/auth/mailcowauth.php b/data/conf/dovecot/auth/mailcowauth.php
index c625522ba..06c0bd995 100644
--- a/data/conf/dovecot/auth/mailcowauth.php
+++ b/data/conf/dovecot/auth/mailcowauth.php
@@ -86,7 +86,7 @@ if ($result === false){
     'remote_addr' => $post['real_rip']
   ));
   if ($result) {
-    error_log('MAILCOWAUTH: App auth for user ' . $post['username']);
+    error_log('MAILCOWAUTH: App auth for user ' . $post['username'] . " with service " . $post['service'] . " from IP " . $post['real_rip']);
     set_sasl_log($post['username'], $post['real_rip'], $post['service']);
   }
 }
@@ -94,9 +94,9 @@ if ($result === false){
   // Init Identity Provider
   $iam_provider = identity_provider('init');
   $iam_settings = identity_provider('get');
-  $result = user_login($post['username'], $post['password'], array('is_internal' => true));
+  $result = user_login($post['username'], $post['password'], array('is_internal' => true, 'service' => $post['service']));
   if ($result) {
-    error_log('MAILCOWAUTH: User auth for user ' . $post['username']);
+    error_log('MAILCOWAUTH: User auth for user ' . $post['username'] . " with service " . $post['service'] . " from IP " . $post['real_rip']);
     set_sasl_log($post['username'], $post['real_rip'], $post['service']);
   }
 }
@@ -105,7 +105,7 @@ if ($result) {
   http_response_code(200); // OK
   $return['success'] = true;
 } else {
-  error_log("MAILCOWAUTH: Login failed for user " . $post['username']);
+  error_log("MAILCOWAUTH: Login failed for user " . $post['username'] . " with service " . $post['service'] . " from IP " . $post['real_rip']);
   http_response_code(401); // Unauthorized
 }
 
diff --git a/data/web/inc/functions.auth.inc.php b/data/web/inc/functions.auth.inc.php
index f1c70103e..059dd4cd9 100644
--- a/data/web/inc/functions.auth.inc.php
+++ b/data/web/inc/functions.auth.inc.php
@@ -193,6 +193,7 @@ function user_login($user, $pass, $extra = null){
   global $iam_settings;
 
   $is_internal = $extra['is_internal'];
+  $service = $extra['service'];
 
   if (!filter_var($user, FILTER_VALIDATE_EMAIL) && !ctype_alnum(str_replace(array('_', '.', '-'), '', $user))) {
     if (!$is_internal){
@@ -235,6 +236,14 @@ function user_login($user, $pass, $extra = null){
       $row = $stmt->fetch(PDO::FETCH_ASSOC);
 
       if (!empty($row)) {
+        // check if user has access to service (imap, smtp, pop3, sieve) if service is set
+        $row['attributes'] = json_decode($row['attributes'], true);
+        if (isset($service)) {
+          $key = strtolower($service) . "_access";
+          if (isset($row['attributes'][$key]) && $row['attributes'][$key] != '1') {
+            return false;
+          }
+        }
         return true;
       }
     }
@@ -242,7 +251,14 @@ function user_login($user, $pass, $extra = null){
     return false;
   }
 
+  // check if user has access to service (imap, smtp, pop3, sieve) if service is set
   $row['attributes'] = json_decode($row['attributes'], true);
+  if (isset($service)) {
+    $key = strtolower($service) . "_access";
+    if (isset($row['attributes'][$key]) && $row['attributes'][$key] != '1') {
+      return false;
+    }
+  }
   switch ($row['authsource']) {
     case 'keycloak':
       // user authsource is keycloak, try using via rest flow