diff --git a/templates/compose/bookstack.yaml b/templates/compose/bookstack.yaml
index d6a86dcd9..dd9719471 100644
--- a/templates/compose/bookstack.yaml
+++ b/templates/compose/bookstack.yaml
@@ -23,6 +23,15 @@ services:
       # You will need to set up an authentication provider as described at https://www.bookstackapp.com/docs/admin/third-party-auth/.
       - GITHUB_APP_ID=${GITHUB_APP_ID}
       - GITHUB_APP_SECRET=${GITHUB_APP_SECRET}
+      # SMTP Mail variables as per https://www.bookstackapp.com/docs/admin/email-webhooks/#email-configuration/.
+      - MAIL_DRIVER=${MAIL_DRIVER:-smtp}
+      - MAIL_HOST=${MAIL_HOST}
+      - MAIL_PORT=${MAIL_PORT:-587}
+      - MAIL_ENCRYPTION=${MAIL_ENCRYPTION:-tls}
+      - MAIL_USERNAME=${MAIL_USERNAME}
+      - MAIL_PASSWORD=${MAIL_PASSWORD}
+      - MAIL_FROM=${MAIL_FROM}
+      - MAIL_FROM_NAME=${MAIL_FROM_NAME:-BookStack}
     volumes:
       - 'bookstack-data:/config'
     healthcheck: