[Web] enforce tenant boundary for SOGo SSO

.github/workflows/close_old_issues_and_prs.yml

@@ -14,7 +14,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Mark/Close Stale Issues and Pull Requests 🗑️
-        uses: actions/stale@v11.0.0
+        uses: actions/stale@v10.4.0
         with:
           repo-token: ${{ secrets.STALE_ACTION_PAT }}
           days-before-stale: 60

data/Dockerfiles/nginx/Dockerfile

@@ -1,4 +1,4 @@
-FROM nginx:1.30.4-alpine
+FROM nginx:1.30.3-alpine
 LABEL maintainer "The Infrastructure Company GmbH <info@servercow.de>"
 
 ENV PIP_BREAK_SYSTEM_PACKAGES=1

data/conf/nginx/templates/nginx.conf.j2

@@ -42,14 +42,17 @@ http {
         https https;
     }
 
+    map $server_port $sogo_auth_internal {
+        65510   "1";
+        default "";
+    }
+
     {% if HTTP_REDIRECT %}
     # HTTP to HTTPS redirect
     server {
         root /web;
         listen {{ HTTP_PORT }} default_server;
-        {% if ENABLE_IPV6 %}
         listen [::]:{{ HTTP_PORT }} default_server;
-        {%endif%}
 
         server_name {{ MAILCOW_HOSTNAME }} autodiscover.* autoconfig.* mta-sts.* {{ ADDITIONAL_SERVER_NAMES | join(' ') }};
 

data/conf/nginx/templates/sites-default.conf.j2

@@ -116,6 +116,8 @@ location ~ \.php$ {
     include /etc/nginx/fastcgi_params;
     fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
     fastcgi_param PATH_INFO $fastcgi_path_info;
+    # trusted internal-auth marker; empty for external clients (see nginx.conf map)
+    fastcgi_param SOGO_AUTH_INTERNAL $sogo_auth_internal;
     fastcgi_read_timeout 3600;
     fastcgi_send_timeout 3600;
 }

data/conf/rspamd/meta_exporter/pipe.php

@@ -53,7 +53,7 @@ $raw_data = mb_convert_encoding($raw_data_content, 'HTML-ENTITIES', "UTF-8");
 $raw_size = (int)$_FILES['message']['size'];
 
 $qid      = $meta['qid']     ?? 'unknown';
-$subject  = $meta['subject'] ?? '';
+$subject  = iconv_mime_decode($meta['subject'] ?? '');
 $score    = $meta['score']   ?? 0;
 $rcpts    = $meta['rcpt']    ?? array();
 $user     = $meta['user']    ?? 'unknown';

data/conf/rspamd/meta_exporter/pushover.php

@@ -50,7 +50,7 @@ $qid      = $meta['qid']    ?? 'unknown';
 $rcpts    = $meta['rcpt']   ?? array();
 $sender   = $meta['from']   ?? '';
 $ip       = $meta['ip']     ?? 'unknown';
-$subject  = $meta['subject'] ?? '';
+$subject  = iconv_mime_decode($meta['subject'] ?? '');
 $messageid= $meta['message_id'] ?? '';
 $priority = 0;
 

data/web/api/openapi.yaml

@@ -185,9 +185,6 @@ paths:
               example:
                 username: info@domain.tld
                 domain: domain.tld
-                description: my time limited alias
-                validity: 8760
-                permanent: false
               properties:
                 username:
                   description: 'the mailbox an alias should be created for'
@@ -195,15 +192,6 @@ paths:
                 domain:
                   description: "the domain"
                   type: string
-                description:
-                  description: "a description for the alias, defaults to an empty string"
-                  type: string
-                validity:
-                  description: "how many hours the alias stays valid, 1 to 87600, defaults to 8760 (one year)"
-                  type: integer
-                permanent:
-                  description: "keep the alias after it expired, defaults to false"
-                  type: boolean
               type: object
       summary: Create time limited alias
   /api/v1/add/app-passwd:
@@ -4920,7 +4908,6 @@ paths:
                       quota: 3221225472
                       quota_used: 0
                       rl: false
-                      sender_acl: ["otherbox@doman3.tld", "@aliasdomain.tld"]
                       spam_aliases: 0
                       username: info@doman3.tld
                       tags: ["tag1", "tag2"]
@@ -5847,7 +5834,6 @@ paths:
                       quota: 3221225472
                       quota_used: 0
                       rl: false
-                      sender_acl: ["otherbox@domain3.tld", "@aliasdomain.tld"]
                       spam_aliases: 0
                       username: info@domain3.tld
                       tags: ["tag1", "tag2"]
@@ -5870,7 +5856,7 @@ paths:
                 response:
                   value:
                     - type: "success"
-                      log: ["cors", "edit", {"allowed_origins": ["*", "https://mail.mailcow.tld"], "allowed_methods": ["POST", "GET", "DELETE", "PUT"]}]
+                      log: ["cors", "edit", {"allowed_origins": ["*", "mail.mailcow.tld"], "allowed_methods": ["POST", "GET", "DELETE", "PUT"]}]
                       msg: "cors_headers_edited"
           description: OK
           headers: { }
@@ -5887,7 +5873,7 @@ paths:
             schema:
               example:
                 attr:
-                  allowed_origins: ["*", "https://mail.mailcow.tld"]
+                  allowed_origins: ["*", "mail.mailcow.tld"]
                   allowed_methods: ["POST", "GET", "DELETE", "PUT"]
               properties:
                 attr:

data/web/inc/functions.domain_admin.inc.php

@@ -429,14 +429,25 @@ function domain_admin_sso($_action, $_data) {
 
   switch ($_action) {
     case 'check':
-      $token = $_data;
+      $token = preg_replace('/[^a-zA-Z0-9-]/', '', $_data);
 
       $stmt = $pdo->prepare("SELECT `t1`.`username` FROM `da_sso` AS `t1` JOIN `admin` AS `t2` ON `t1`.`username` = `t2`.`username` WHERE `t1`.`token` = :token AND `t1`.`created` > DATE_SUB(NOW(), INTERVAL '30' SECOND) AND `t2`.`active` = 1 AND `t2`.`superadmin` = 0;");
       $stmt->execute(array(
-        ':token' => preg_replace('/[^a-zA-Z0-9-]/', '', $token)
+        ':token' => $token
       ));
       $return = $stmt->fetch(PDO::FETCH_ASSOC);
-      return empty($return['username']) ? false : $return['username'];
+      if (empty($return['username'])) {
+        return false;
+      }
+      // single-use: consume the token; if a concurrent request already used it, deny
+      $del = $pdo->prepare("DELETE FROM `da_sso` WHERE `token` = :token");
+      $del->execute(array(
+        ':token' => $token
+      ));
+      if ($del->rowCount() < 1) {
+        return false;
+      }
+      return $return['username'];
     case 'issue':
       if ($_SESSION['mailcow_cc_role'] != "admin") {
         $_SESSION['return'][] = array(

data/web/inc/functions.inc.php

@@ -53,28 +53,6 @@ function valid_network($network) {
 function valid_hostname($hostname) {
   return filter_var($hostname, FILTER_VALIDATE_DOMAIN, FILTER_FLAG_HOSTNAME);
 }
-// Validates a browser-style Origin: scheme://host[:port], no path/query/fragment/credentials
-function valid_origin($origin) {
-  $parts = parse_url($origin);
-  if ($parts === false || !isset($parts['scheme']) || !isset($parts['host'])) {
-    return false;
-  }
-  if (!in_array(strtolower($parts['scheme']), array('http', 'https'), true)) {
-    return false;
-  }
-  if (isset($parts['user']) || isset($parts['pass']) || isset($parts['path']) || isset($parts['query']) || isset($parts['fragment'])) {
-    return false;
-  }
-  $host = $parts['host'];
-  $host_without_brackets = trim($host, '[]');
-  if (!valid_hostname($host_without_brackets) && !filter_var($host_without_brackets, FILTER_VALIDATE_IP)) {
-    return false;
-  }
-  // Reject anything that doesn't round-trip to the exact same origin (e.g. stray trailing slash)
-  $port = isset($parts['port']) ? ':' . $parts['port'] : '';
-  $rebuilt = strtolower($parts['scheme']) . '://' . strtolower($host) . $port;
-  return strtolower($origin) === $rebuilt;
-}
 // Thanks to https://stackoverflow.com/a/49373789
 // Validates exact ip matches and ip-in-cidr, ipv4 and ipv6
 function ip_acl($ip, $networks) {
@@ -2305,13 +2283,10 @@ function cors($action, $data = null) {
         return false;
       }
 
-      $allowed_origins = isset($data['allowed_origins']) ? $data['allowed_origins'] : array(getBaseURL());
+      $allowed_origins = isset($data['allowed_origins']) ? $data['allowed_origins'] : array($_SERVER['SERVER_NAME']);
       $allowed_origins = !is_array($allowed_origins) ? array_filter(array_map('trim', explode("\n", $allowed_origins))) : $allowed_origins;
-      foreach ($allowed_origins as &$origin) {
-        if ($origin === '*') {
-          continue;
-        }
-        if (!valid_origin($origin)) {
+      foreach ($allowed_origins as $origin) {
+        if (!filter_var($origin, FILTER_VALIDATE_DOMAIN, FILTER_FLAG_HOSTNAME) && $origin != '*') {
           $_SESSION['return'][] = array(
             'type' => 'danger',
             'log' => array(__FUNCTION__, $action, $data),
@@ -2319,10 +2294,7 @@ function cors($action, $data = null) {
           );
           return false;
         }
-        // browsers always send a lowercase scheme/host in the Origin header, so normalize to match
-        $origin = strtolower($origin);
       }
-      unset($origin);
 
       $allowed_methods = isset($data['allowed_methods']) ? $data['allowed_methods'] : array('GET', 'POST', 'PUT', 'DELETE');
       $allowed_methods  = !is_array($allowed_methods) ? array_map('trim', preg_split( "/( |,|;|\n)/", $allowed_methods)) : $allowed_methods;

data/web/inc/functions.mailbox.inc.php

@@ -41,15 +41,13 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
           else {
             $username = $_SESSION['mailcow_cc_username'];
           }
-          if (isset($_data["validity"])) {
-            if (!filter_var($_data["validity"], FILTER_VALIDATE_INT, array('options' => array('min_range' => 1, 'max_range' => 87600)))) {
-              $_SESSION['return'][] = array(
-                'type' => 'danger',
-                'log' => array(__FUNCTION__, $_action, $_type, $_data_log, $_attr),
-                'msg' => 'validity_missing'
-              );
-              return false;
-            }
+          if (isset($_data["validity"]) && !filter_var($_data["validity"], FILTER_VALIDATE_INT, array('options' => array('min_range' => 1, 'max_range' => 87600)))) {
+            $_SESSION['return'][] = array(
+              'type' => 'danger',
+              'log' => array(__FUNCTION__, $_action, $_type, $_data_log, $_attr),
+              'msg' => 'validity_missing'
+            );
+            return false;
           }
           else {
             // Default to 1 yr
@@ -62,8 +60,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
             $permanent = 0;
           }
           $domain = $_data['domain'];
-          // spamalias.description is NOT NULL, an absent description must not become a null insert
-          $description = $_data['description'] ?? '';
+          $description = $_data['description'];
           $valid_domains[] = mailbox('get', 'mailbox_details', $username)['domain'];
           $valid_alias_domains = user_get_alias_details($username)['alias_domains'];
           if (!empty($valid_alias_domains)) {
@@ -5323,14 +5320,6 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
               $mailboxdata['rl_scope'] = 'domain';
             }
             $mailboxdata['is_relayed'] = $row['backupmx'];
-            // Internal send-as ACL for this mailbox, mirrors the sender_acl field accepted by edit/mailbox
-            $mailboxdata['sender_acl'] = array();
-            $stmt = $pdo->prepare("SELECT `send_as` FROM `sender_acl` WHERE `logged_in_as` = :username AND `external` = '0'");
-            $stmt->execute(array(':username' => $_data));
-            $sender_acl_rows = $stmt->fetchAll(PDO::FETCH_ASSOC);
-            foreach ($sender_acl_rows as $sender_acl_row) {
-              $mailboxdata['sender_acl'][] = $sender_acl_row['send_as'];
-            }
           }
           $stmt = $pdo->prepare("SELECT `tag_name`
             FROM `tags_mailbox` WHERE `username`= :username");
@@ -5658,8 +5647,11 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
             $stmt->execute(array(
               ':username' => $username
             ));
-            $stmt = $pdo->prepare("DELETE FROM `sogo_acl` WHERE `c_object` LIKE '%/" . $username . "/%' OR `c_uid` = :username");
+            // bind LIKE pattern + escape LIKE wildcards so the value matches literally (no SQLi, no over-match)
+            $c_object_like = '%/' . addcslashes($username, '\\%_') . '/%';
+            $stmt = $pdo->prepare("DELETE FROM `sogo_acl` WHERE `c_object` LIKE :c_object_like OR `c_uid` = :username");
             $stmt->execute(array(
+              ':c_object_like' => $c_object_like,
               ':username' => $username
             ));
             $stmt = $pdo->prepare("DELETE FROM `sogo_store` WHERE `c_folder_id` IN (SELECT `c_folder_id` FROM `sogo_folder_info` WHERE `c_path2` = :username)");
@@ -6055,8 +6047,11 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
             $stmt->execute(array(
               ':username' => $username
             ));
-            $stmt = $pdo->prepare("DELETE FROM `sogo_acl` WHERE `c_object` LIKE '%/" . str_replace('%', '\%', $username) . "/%' OR `c_uid` = :username");
+            // bind LIKE pattern + escape LIKE wildcards so the value matches literally (no SQLi, no over-match)
+            $c_object_like = '%/' . addcslashes($username, '\\%_') . '/%';
+            $stmt = $pdo->prepare("DELETE FROM `sogo_acl` WHERE `c_object` LIKE :c_object_like OR `c_uid` = :username");
             $stmt->execute(array(
+              ':c_object_like' => $c_object_like,
               ':username' => $username
             ));
             $stmt = $pdo->prepare("DELETE FROM `sogo_store` WHERE `c_folder_id` IN (SELECT `c_folder_id` FROM `sogo_folder_info` WHERE `c_path2` = :username)");
@@ -6212,8 +6207,11 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
             $stmt->execute(array(
               ':username' => $name
             ));
-            $stmt = $pdo->prepare("DELETE FROM `sogo_acl` WHERE `c_object` LIKE '%/" . $name . "/%' OR `c_uid` = :username");
+            // bind LIKE pattern + escape LIKE wildcards so the value matches literally (no SQLi, no over-match)
+            $c_object_like = '%/' . addcslashes($name, '\\%_') . '/%';
+            $stmt = $pdo->prepare("DELETE FROM `sogo_acl` WHERE `c_object` LIKE :c_object_like OR `c_uid` = :username");
             $stmt->execute(array(
+              ':c_object_like' => $c_object_like,
               ':username' => $name
             ));
             $stmt = $pdo->prepare("DELETE FROM `sogo_store` WHERE `c_folder_id` IN (SELECT `c_folder_id` FROM `sogo_folder_info` WHERE `c_path2` = :username)");

data/web/inc/functions.quarantine.inc.php

@@ -22,7 +22,7 @@ function quarantine($_action, $_data = null) {
         return false;
       }
       $stmt = $pdo->prepare('SELECT `id` FROM `quarantine` LEFT OUTER JOIN `user_acl` ON `user_acl`.`username` = `rcpt`
-        WHERE `qhash` = :hash
+        WHERE `qhash` = :hash
           AND user_acl.quarantine = 1
           AND rcpt IN (SELECT username FROM mailbox)');
       $stmt->execute(array(':hash' => $hash));
@@ -65,7 +65,7 @@ function quarantine($_action, $_data = null) {
         return false;
       }
       $stmt = $pdo->prepare('SELECT `id` FROM `quarantine` LEFT OUTER JOIN `user_acl` ON `user_acl`.`username` = `rcpt`
-        WHERE `qhash` = :hash
+        WHERE `qhash` = :hash
           AND `user_acl`.`quarantine` = 1
           AND `username` IN (SELECT `username` FROM `mailbox`)');
       $stmt->execute(array(':hash' => $hash));
@@ -170,6 +170,8 @@ function quarantine($_action, $_data = null) {
         }
         elseif ($release_format == 'raw') {
           $detail_row['msg'] = preg_replace('/^X-Spam-Flag: (.*)/m', 'X-Pre-Release-Spam-Flag: $1', $detail_row['msg']);
+          // dot-stuffing per RFC5321 4.5.2: escape leading dots
+          $detail_row['msg'] = preg_replace('~^\.~m', '..', $detail_row['msg']);
           $postfix_talk = array(
             array('220', 'HELO quarantine' . chr(10)),
             array('250', 'MAIL FROM: ' . $sender . chr(10)),
@@ -180,7 +182,7 @@ function quarantine($_action, $_data = null) {
             array('221', '')
           );
           // Thanks to https://stackoverflow.com/questions/6632399/given-an-email-as-raw-text-how-can-i-send-it-using-php
-          $smtp_connection = fsockopen($postfix, 590, $errno, $errstr, 1); 
+          $smtp_connection = fsockopen($postfix, 590, $errno, $errstr, 1);
           if (!$smtp_connection) {
             logger(array('return' => array(
               array(
@@ -192,7 +194,7 @@ function quarantine($_action, $_data = null) {
             return false;
           }
           for ($i=0; $i < count($postfix_talk); $i++) {
-            $smtp_resource = fgets($smtp_connection, 256); 
+            $smtp_resource = fgets($smtp_connection, 256);
             if (substr($smtp_resource, 0, 3) !== $postfix_talk[$i][0]) {
               $ret = substr($smtp_resource, 0, 3);
               $ret = (empty($ret)) ? '-' : $ret;
@@ -465,17 +467,19 @@ function quarantine($_action, $_data = null) {
           }
           elseif ($release_format == 'raw') {
             $row['msg'] = preg_replace('/^X-Spam-Flag: (.*)/m', 'X-Pre-Release-Spam-Flag: $1', $row['msg']);
+            // dot-stuffing per RFC5321 4.5.2: escape leading dots
+            $row['msg'] = preg_replace('~^\.~m', '..', $row['msg']);
             $postfix_talk = array(
               array('220', 'HELO quarantine' . chr(10)),
               array('250', 'MAIL FROM: ' . $sender . chr(10)),
               array('250', 'RCPT TO: ' . $row['rcpt'] . chr(10)),
               array('250', 'DATA' . chr(10)),
-              array('354', str_replace("\n.", '', $row['msg']) . chr(10) . '.' . chr(10)),
+              array('354', $row['msg'] . chr(10) . '.' . chr(10)),
               array('250', 'QUIT' . chr(10)),
               array('221', '')
             );
             // Thanks to https://stackoverflow.com/questions/6632399/given-an-email-as-raw-text-how-can-i-send-it-using-php
-            $smtp_connection = fsockopen($postfix, 590, $errno, $errstr, 1); 
+            $smtp_connection = fsockopen($postfix, 590, $errno, $errstr, 1);
             if (!$smtp_connection) {
               $_SESSION['return'][] = array(
                 'type' => 'warning',
@@ -485,7 +489,7 @@ function quarantine($_action, $_data = null) {
               return false;
             }
             for ($i=0; $i < count($postfix_talk); $i++) {
-              $smtp_resource = fgets($smtp_connection, 256); 
+              $smtp_resource = fgets($smtp_connection, 256);
               if (substr($smtp_resource, 0, 3) !== $postfix_talk[$i][0]) {
                 $ret = substr($smtp_resource, 0, 3);
                 $ret = (empty($ret)) ? '-' : $ret;
@@ -833,7 +837,7 @@ function quarantine($_action, $_data = null) {
         )));
         return false;
       }
-      $stmt = $pdo->prepare('SELECT * FROM `quarantine` WHERE `qhash` = :hash');
+      $stmt = $pdo->prepare('SELECT * FROM `quarantine` WHERE `qhash` = :hash');
       $stmt->execute(array(':hash' => $hash));
       return $stmt->fetch(PDO::FETCH_ASSOC);
     break;

data/web/js/site/dashboard.js

@@ -1089,6 +1089,8 @@ jQuery(function($){
         return str;
       }).join('<br>\n');
       item.subject = escapeHtml(item.subject);
+      if (item.sender_mime != null) item.sender_mime = escapeHtml(item.sender_mime);
+      if (item['message-id'] != null) item['message-id'] = escapeHtml(item['message-id']);
       var scan_time = item.time_real.toFixed(3);
       if (item.time_virtual) {
         scan_time += ' / ' + item.time_virtual.toFixed(3);
@@ -1212,6 +1214,11 @@ jQuery(function($){
       });
     } else if (table == 'rllog') {
       $.each(data, function (i, item) {
+        if (item.header_from != null) item.header_from = escapeHtml(item.header_from);
+        if (item.header_subject != null) item.header_subject = escapeHtml(item.header_subject);
+        if (item.from != null) item.from = escapeHtml(item.from);
+        if (item.rcpt != null) item.rcpt = escapeHtml(item.rcpt);
+        if (item.message_id != null) item.message_id = escapeHtml(item.message_id);
         if (item.user == null) {
           item.user = "none";
         }

data/web/js/site/mailbox.js

@@ -996,6 +996,7 @@ jQuery(function($){
               'style="min-width:2em;width:' + item.percent_in_use + '%">' + item.percent_in_use + '%' + '</div></div>'
             };
             item.username = escapeHtml(item.username);
+            item.name = escapeHtml(item.name);
 
             if (Array.isArray(item.tags)){
               var tags = '';

data/web/sogo-auth.php

@@ -8,8 +8,12 @@ $ALLOW_ADMIN_EMAIL_LOGIN = (preg_match(
 $session_var_user_allowed = 'sogo-sso-user-allowed';
 $session_var_pass = 'sogo-sso-pass';
 
+// only the internal nginx auth_request loopback (127.0.0.1:65510) sets this;
+// external clients can never supply it (bare fastcgi param, not an HTTP header)
+$is_internal_auth = (($_SERVER['SOGO_AUTH_INTERNAL'] ?? '') === '1');
+
 // validate credentials for basic auth requests
-if (isset($_SERVER['PHP_AUTH_USER'])) {
+if ($is_internal_auth && isset($_SERVER['PHP_AUTH_USER'])) {
   // load prerequisites only when required
   require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/prerequisites.inc.php';
 
@@ -50,6 +54,11 @@ elseif (isset($_GET['login'])) {
     (($_SESSION['acl']['login_as'] == "1" && $ALLOW_ADMIN_EMAIL_LOGIN !== 0) || ($is_dual === false && $login == $_SESSION['mailcow_cc_username']))) {
     if (filter_var($login, FILTER_VALIDATE_EMAIL)) {
       if (user_get_alias_details($login) !== false) {
+        // enforce tenant boundary
+        if (!hasMailboxObjectAccess($_SESSION['mailcow_cc_username'], $_SESSION['mailcow_cc_role'], $login)) {
+          header("Location: /");
+          exit;
+        }
         // Block SOGo access if pending actions (2FA setup, password update)
         if (!empty($_SESSION['pending_tfa_setup']) || !empty($_SESSION['pending_pw_update'])) {
           header("Location: /");
@@ -80,7 +89,7 @@ elseif (isset($_GET['login'])) {
   exit;
 }
 // only check for admin-login on sogo GUI requests
-elseif (isset($_SERVER['HTTP_X_ORIGINAL_URI']) && strcasecmp(substr($_SERVER['HTTP_X_ORIGINAL_URI'], 0, 9), "/SOGo/so/") === 0) {
+elseif ($is_internal_auth && isset($_SERVER['HTTP_X_ORIGINAL_URI']) && strcasecmp(substr($_SERVER['HTTP_X_ORIGINAL_URI'], 0, 9), "/SOGo/so/") === 0) {
   // this is an nginx auth_request call, we check for existing sogo-sso session variables
   require_once $_SERVER['DOCUMENT_ROOT'] . '/inc/vars.inc.php';
   if (file_exists($_SERVER['DOCUMENT_ROOT'] . '/inc/vars.local.inc.php')) {

docker-compose.yml

@@ -419,7 +419,7 @@ services:
         - php-fpm-mailcow
         - sogo-mailcow
         - rspamd-mailcow
-      image: ghcr.io/mailcow/nginx:1.30.4
+      image: ghcr.io/mailcow/nginx:1.30.3-1
       dns:
         - ${IPV4_NETWORK:-172.22.1}.254
       environment: