diff --git a/core/nginx/Dockerfile b/core/nginx/Dockerfile
index e5f33069..a7df8c2d 100644
--- a/core/nginx/Dockerfile
+++ b/core/nginx/Dockerfile
@@ -27,7 +27,7 @@ COPY proxy.conf login.lua /
 RUN echo $VERSION >/version
 
 EXPOSE 80/tcp 443/tcp 110/tcp 143/tcp 465/tcp 587/tcp 993/tcp 995/tcp 25/tcp 4190/tcp
-# EXPOSE 10025/tcp 10143/tcp
+# EXPOSE 10025/tcp 10143/tcp 14190/tcp
 HEALTHCHECK --start-period=60s CMD curl -skfLo /dev/null http://127.0.0.1:10204/health && kill -0 `cat /run/dovecot/master.pid`
 
 VOLUME ["/certs", "/overrides"]
diff --git a/core/nginx/proxy.conf b/core/nginx/proxy.conf
index f5b7cf81..64591626 100644
--- a/core/nginx/proxy.conf
+++ b/core/nginx/proxy.conf
@@ -61,4 +61,7 @@ service managesieve-login {
     haproxy = yes
 {% endif %}
   }
+  inet_listener sieve-webmail {
+    port = 14190
+  }
 }
diff --git a/webmails/roundcube/config/config.inc.php b/webmails/roundcube/config/config.inc.php
index f5399a2d..94593e2d 100644
--- a/webmails/roundcube/config/config.inc.php
+++ b/webmails/roundcube/config/config.inc.php
@@ -24,7 +24,7 @@ $config['smtp_user'] = '%u';
 $config['smtp_pass'] = '%p';
 
 // Sieve script management
-$config['managesieve_host'] = 'tls://{{ FRONT_ADDRESS or "front" }}:4190';
+$config['managesieve_host'] = 'tls://{{ FRONT_ADDRESS or "front" }}:14190';
 $config['managesieve_conn_options'] = array(
   'ssl'         => array(
      'verify_peer'  => false,
diff --git a/webmails/snappymail/defaults/default.json b/webmails/snappymail/defaults/default.json
index 96bd3a7d..28107f4d 100644
--- a/webmails/snappymail/defaults/default.json
+++ b/webmails/snappymail/defaults/default.json
@@ -33,7 +33,7 @@
     },
     "Sieve": {
         "host": "{{ FRONT_ADDRESS }}",
-        "port": 4190,
+        "port": 14190,
         "type": 2,
         "shortLogin": false,
         "ssl": {