diff --git a/adminer/docker-compose.yml b/adminer/docker-compose.yml
index d85ddae..bf05519 100644
--- a/adminer/docker-compose.yml
+++ b/adminer/docker-compose.yml
@@ -1,4 +1,5 @@
 services:
+
   adminer:
     image: adminer:latest
     container_name: adminer
diff --git a/adminer/sample-extends.yml b/adminer/sample-extends.yml
index dbda475..a65a165 100644
--- a/adminer/sample-extends.yml
+++ b/adminer/sample-extends.yml
@@ -1,7 +1,6 @@
-version: '3.4'
-
 services:
-  mariadb:
+
+  adminer:
     extends:
       file: ${COOKBOOK}/adminer/docker-compose.yml
       service: adminer
diff --git a/mariadb/sample-extends.yml b/mariadb/sample-extends.yml
index 22f977a..ed811eb 100644
--- a/mariadb/sample-extends.yml
+++ b/mariadb/sample-extends.yml
@@ -1,6 +1,5 @@
-version: '3.4'
-
 services:
+
   mariadb:
     extends:
       file: ${COOKBOOK}/mariadb/docker-compose.yml
diff --git a/poste/README.md b/poste/README.md
new file mode 100644
index 0000000..c6d7de6
--- /dev/null
+++ b/poste/README.md
@@ -0,0 +1,4 @@
+# Poste.io
+
+[Documentation](https://poste.io/doc/)
+
diff --git a/poste/docker-compose.yml b/poste/docker-compose.yml
new file mode 100644
index 0000000..5d02d46
--- /dev/null
+++ b/poste/docker-compose.yml
@@ -0,0 +1,19 @@
+services:
+  poste:
+    image: analogic/poste.io
+    container_name: poste
+    restart: unless-stopped
+    ports:
+      - "25:25"     # SMTP
+      - "110:110"   # POP3
+      - "143:143"   # IMAP
+      - "587:587"   # Submission (SMTP client relay)
+      - "993:993"   # IMAPS
+      - "995:995"   # POP3S
+      - "8080:80"   # Internal HTTP for reverse proxy
+    environment:
+      - HTTPS=ON
+      - PUBLIC_HOSTNAME=${POSTE_PUBLIC_HOSTNAME:-mail.yourdomain.com}
+      - TZ=${TZ:-America/Vancouver}
+    volumes:
+      - ./data:/data
diff --git a/poste/sample-extends.yml b/poste/sample-extends.yml
new file mode 100644
index 0000000..e6d3116
--- /dev/null
+++ b/poste/sample-extends.yml
@@ -0,0 +1,6 @@
+services:
+
+  poste:
+    extends:
+      file: ${COOKBOOK}/poste/docker-compose.yml
+      service: poste
diff --git a/poste/sample.env b/poste/sample.env
new file mode 100644
index 0000000..714a995
--- /dev/null
+++ b/poste/sample.env
@@ -0,0 +1,8 @@
+# Global
+COOKBOOK=/git/docker-compose-cookbooks
+VOL_PATH=./data
+TZ=America/Vancouver
+COMPOSE_PROJECT_NAME=poste
+
+# Poste
+POSTE_PUBLIC_HOSTNAME=yourDomain.com
diff --git a/stashapp/sample-extends.yml b/stashapp/sample-extends.yml
index 30c443e..ae03668 100644
--- a/stashapp/sample-extends.yml
+++ b/stashapp/sample-extends.yml
@@ -1,6 +1,5 @@
-version: '3.4'
-
 services:
+
   stashapp:
     extends:
       file: ${COOKBOOK}/stashapp/docker-compose.yml
diff --git a/stashapp/sample.env b/stashapp/sample.env
index feb9ab6..e78343f 100644
--- a/stashapp/sample.env
+++ b/stashapp/sample.env
@@ -1,6 +1,7 @@
 COOKBOOK=/git/docker-compose-cookbooks #HELP: cookbooks
 VOL_PATH=./data
 TZ="America/Vancouver"
+COMPOSE_PROJECT_NAME=stash
 
 # stashapp
 STASHAPP_IMAGE=stashapp/stash:latest