diff --git a/build/docker/Dockerfile b/build/docker/Dockerfile
index 69f4d27b26f..5cd4c60673b 100644
--- a/build/docker/Dockerfile
+++ b/build/docker/Dockerfile
@@ -50,7 +50,7 @@ RUN echo 'xdebug.idekey="netbeans-xdebug"' >> ${PHP_INI_DIR}/php.ini
 # set up sendmail config, to use maildev
 RUN echo "account default" > /etc/msmtprc
 RUN echo "auth off" >> /etc/msmtprc
-RUN echo "port 25" >> /etc/msmtprc
+RUN echo "port 1025" >> /etc/msmtprc
 RUN echo "host mail" >> /etc/msmtprc
 RUN echo "from local@localdomain.com" >> /etc/msmtprc
 RUN echo "domain localhost.localdomain" >> /etc/msmtprc
diff --git a/build/docker/docker-compose.yml b/build/docker/docker-compose.yml
index ddcdc58560a..cc2988a67d1 100644
--- a/build/docker/docker-compose.yml
+++ b/build/docker/docker-compose.yml
@@ -55,8 +55,8 @@ services:
     mail:
         image: maildev/maildev
         ports:
-            - "8081:80"
-            - "25:25"
+            - "8081:1080"
+            - "25:1025"
         networks:
             - internal-pod
             - external-pod