diff --git a/.env.sample b/.env.sample
index b8f04a6..04af779 100644
--- a/.env.sample
+++ b/.env.sample
@@ -12,6 +12,7 @@ SECRET_SMTP_PASSWORD_VERSION=v1
 SYMFONY__ENV__FOSUSER_REGISTRATION=true
 SYMFONY__ENV__MAILER_HOST=127.0.0.1
 SYMFONY__ENV__MAILER_USER=~
+SYMFONY__ENV__MAILER_PORT=465
 SYMFONY__ENV__FROM_EMAIL=
 
 COMPOSE_FILE="compose.yml"
diff --git a/abra.sh b/abra.sh
index db2dfdb..7de1c9e 100644
--- a/abra.sh
+++ b/abra.sh
@@ -1 +1 @@
-export ENTRYPOINT_VERSION=v4
+export ENTRYPOINT_VERSION=v6
diff --git a/compose.yml b/compose.yml
index 9735796..7ff4940 100644
--- a/compose.yml
+++ b/compose.yml
@@ -7,6 +7,7 @@ services:
       - POPULATE_DATABASE="false"
       - SYMFONY__ENV__MAILER_HOST
       - SYMFONY__ENV__MAILER_USER
+      - SYMFONY__ENV__MAILER_PORT
       - SYMFONY__ENV__MAILER_PASSWORD_FILE=/run/secrets/smtp_password
       - SYMFONY__ENV__FROM_EMAIL
       - SYMFONY__ENV__DOMAIN_NAME=https://${DOMAIN}
diff --git a/entrypoint.sh.tmpl b/entrypoint.sh.tmpl
index 094b321..42a96e9 100644
--- a/entrypoint.sh.tmpl
+++ b/entrypoint.sh.tmpl
@@ -3,7 +3,7 @@
 export SYMFONY__ENV__DATABASE_PASSWORD=$(cat $SYMFONY__ENV__DATABASE_PASSWORD_FILE)
 export SYMFONY__ENV__SECRET=$(cat $SYMFONY__ENV__SECRET_FILE)
 
-export SYMFONY__ENV__MAILER_DSN=smtp://${SYMFONY__ENV__MAILER_USER}:$(cat ${SYMFONY__ENV__MAILER_PASSWORD_FILE})@${SYMFONY__ENV__MAILER_HOST}:465
+export SYMFONY__ENV__MAILER_DSN=smtp://${SYMFONY__ENV__MAILER_USER}:$(cat ${SYMFONY__ENV__MAILER_PASSWORD_FILE})@${SYMFONY__ENV__MAILER_HOST}:${SYMFONY__ENV__MAILER_PORT:-465}
 
 # https://github.com/wallabag/docker/blob/master/root/entrypoint.sh
 sh -c "/entrypoint.sh migrate"