diff --git a/bluesky/hooks/smtp_server-relation-joined b/bluesky/hooks/smtp_server-relation-joined
new file mode 100755
index 0000000..fc0b906
--- /dev/null
+++ b/bluesky/hooks/smtp_server-relation-joined
@@ -0,0 +1,61 @@
+#!/bin/bash
+
+set -e
+
+host=$(relation-get host)
+port=$(relation-get port)
+connection_security=$(relation-get connection-security)
+auth_method=$(relation-get auth-method)
+
+opts=()
+declare -A ENV
+case "$connection_security" in
+    "none")
+        url+="smtp://"
+        opts+=(
+            "ignoreTLS=true"
+            "secure=false"
+        )
+        ;;
+    "ssl/tls")
+        url+="smtps://"
+        ;;
+    *)
+        error "Unsupported connection security: $connection_security"
+        exit 1
+        ;;
+esac
+case "$auth_method" in
+    "none")
+        :
+        ;;
+    "password")
+        login=$(relation-get login) || true
+        password=$(relation-get password) || true
+        url+="$login:$password@"
+        ;;
+    *)
+        error "Unsupported auth method: $auth_method"
+        exit 1
+        ;;
+esac
+
+url+="$host:$port/"
+
+first=1
+for opt in "${opts[@]}"; do
+    if [ $first -eq 1 ]; then
+        url+="?"
+        first=0
+    else
+        url+="&"
+    fi
+    url+="$opt"
+done
+
+config-add "\
+services:
+  $MASTER_BASE_SERVICE_NAME:
+    environment:
+      PDS_EMAIL_SMTP_URL: \"$url\"
+"
diff --git a/bluesky/metadata.yml b/bluesky/metadata.yml
index cddd8fe..3edc7b7 100644
--- a/bluesky/metadata.yml
+++ b/bluesky/metadata.yml
@@ -2,8 +2,11 @@ docker-image: docker.0k.io/bluesky:0.4.67  ## from: ghcr.io/bluesky-social/pds:0
 data-resources:
   - /var/lib/bluesky
 
-default-options:
+docker-compose:
+  environment:
+    PDS_EMAIL_FROM_ADDRESS: "no-reply@no-domain.org"
 
+default-options:
 uses:
   web-proxy:
     #constraint: required | recommended | optional
@@ -28,3 +31,8 @@ uses:
       ##  - must start with a '/', will start from $SERVICE_DATASTORE
       #exclude-patterns:
       #  - "/var/lib/odoo/sessions/"
+  smtp-server:
+    constraint: optional
+    auto: pair
+    solves:
+      mail: "verify email"