mail notification

.env.example

@@ -7,3 +7,12 @@ DATA_DIR=/data
 DATABASE_URL=sqlite:////data/app.db
 # Set to true only when TLS terminates in front of this service.
 SESSION_HTTPS_ONLY=false
+# Optional: SMTP settings for "email me when action is required" user
+# notifications. Leave SMTP_HOST unset to disable sending (notifications are
+# silently skipped rather than failing a sync run).
+SMTP_HOST=
+SMTP_PORT=587
+SMTP_USERNAME=
+SMTP_PASSWORD=
+SMTP_FROM_ADDRESS=
+SMTP_USE_TLS=true