set up mail in docker network

compose.yaml

@@ -4,7 +4,7 @@ services:
     #command: '--default-authentication-plugin=mysql_native_password'
     restart: always
     healthcheck:
-      test: ['CMD-SHELL', 'mysqladmin ping -h 127.0.0.1 --password="rootpass" --silent']
+      test: ['CMD-SHELL', 'mysqladmin ping -h 127.0.0.1 --password="${DOTENV_MYSQL_ROOT_PASSWORD}" --silent']
       interval: 3s
       retries: 5
       start_period: 30s
@@ -57,6 +57,13 @@ services:
       - GITEA__database__USER=gitea
       - GITEA__database__PASSWD=${DOTENV_MYSQL_GITEA_PASSWORD}
       - GITEA__repository__DEFAULT_BRANCH=master
+      - GITEA__mailer__ENABLED=true
+      - GITEA__mailer__FROM=${GITEA_MAIL_FROM}
+      - GITEA__mailer__USER=
+      - GITEA__mailer__PROTOCOL=smtp
+      - GITEA__mailer__SMTP_ADDR=pmb
+      - GITEA__mailer__SMTP_PORT=25
+
       # To disable new users after setup:
       #- GITEA__service__DISABLE_REGISTRATION=false
     networks:
@@ -88,8 +95,30 @@ services:
     networks:
       - frontnet
 
+  pmb:
+    build:
+      args:
+        GPG_PP: $BUILD_GPG_PP
+      context: pmb-pf
+      #context: .
+      dockerfile: Dockerfile
+    #image: juanluisbaptiste/postfix:latest
+    expose:
+      - "25"
+    env_file:
+      - pmb-pf/.env
+      #- .env
+    restart: always
+    volumes:
+      - pmb-root:/root
+      - "/etc/localtime:/etc/localtime:ro"
+    networks:
+      - backnet
+
+
 volumes:
   db-data:
+  pmb-root:
 
 networks:
   backnet: