diff --git a/docker-compose.yaml b/docker-compose.yaml
index e29abaf9..00da94db 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -38,7 +38,6 @@ services:
       MAIL_DOMAIN: $MAIL_DOMAIN
       CMDEPLOY_STAGES: ${CMDEPLOY_STAGES:-}
       CHATMAIL_NOSYSCTL: ${CHATMAIL_NOSYSCTL:-True}
-      CHATMAIL_NOPORTCHECK: ${CHATMAIL_NOPORTCHECK:-True}
       TLS_EXTERNAL_CERT_AND_KEY: ${TLS_EXTERNAL_CERT_AND_KEY:-}
     network_mode: "host"
     volumes:
diff --git a/docker/files/setup_chatmail_docker.sh b/docker/files/setup_chatmail_docker.sh
index ff4c45ab..51132bb7 100755
--- a/docker/files/setup_chatmail_docker.sh
+++ b/docker/files/setup_chatmail_docker.sh
@@ -3,7 +3,6 @@
 set -euo pipefail
 export CHATMAIL_INI="${CHATMAIL_INI:-/etc/chatmail/chatmail.ini}"
 export CHATMAIL_NOSYSCTL=True
-export CHATMAIL_NOPORTCHECK=True
 
 CMDEPLOY=/opt/cmdeploy/bin/cmdeploy