diff --git a/dockers/sympa/Dockerfile b/dockers/sympa/Dockerfile
index 732c8aa..043d356 100644
--- a/dockers/sympa/Dockerfile
+++ b/dockers/sympa/Dockerfile
@@ -52,6 +52,14 @@ RUN mkdir -p /var/log/mail; touch /var/log/mail/filter.log ; chown filter /var/l
 RUN mkdir -p /var/spool/filter ; chmod 775 /var/spool/filter ; chown filter /var/spool/filter
 RUN mkdir -p /var/log/mail/pb ; chmod a+rwx /var/log/mail/pb
 
+# install de opendkim
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        opendkim \
+        opendkim-tools \
+    && rm -rf /var/lib/apt/lists/*
+    
+
 COPY dockers/sympa/config/sympa.preseed /tmp/sympa.preseed
 RUN debconf-set-selections < /tmp/sympa.preseed \
     && apt-get update \
diff --git a/dockers/sympa/config/supervisord.conf b/dockers/sympa/config/supervisord.conf
index f6b8907..4a3bf22 100644
--- a/dockers/sympa/config/supervisord.conf
+++ b/dockers/sympa/config/supervisord.conf
@@ -31,6 +31,15 @@ command=/usr/sbin/rsyslogd -n
 stdout_events_enabled=true
 stderr_events_enabled=true
 
+[program:opendkim]
+startsecs=0
+stopwaitsecs=10
+autostart=true
+autorestart=true
+command=/usr/sbin/opendkim -f -x /etc/opendkim/opendkim.conf
+stdout_events_enabled=true
+stderr_events_enabled=true
+
 [program:postfix]
 startsecs=0
 stopwaitsecs=55
diff --git a/dockers/sympa/docker-compose.yml b/dockers/sympa/docker-compose.yml
index 1e8f8dc..baa90cb 100644
--- a/dockers/sympa/docker-compose.yml
+++ b/dockers/sympa/docker-compose.yml
@@ -33,6 +33,9 @@ services:
       - /etc/localtime:/etc/localtime:ro
       - /etc/timezone:/etc/timezone:ro
       - /etc/ssl:/etc/ssl:ro
+      - ./config/opendkim:/etc/opendkim
+      - /var/lib/docker/volumes/postfix_mailConfig/_data/opendkim/keys:/etc/opendkim/keys:ro
+       
     labels:
       - "traefik.enable=true"
       - "traefik.http.routers.sympa.rule=host(`listes.${domain}`)"