diff --git a/Install-and-Update.md b/Install-and-Update.md
index 97dfc35..7209f7c 100644
--- a/Install-and-Update.md
+++ b/Install-and-Update.md
@@ -77,6 +77,7 @@ Now we just need to make some settings through env variables:
 export MONGO_URL='mongodb://127.0.0.1:27017/wekan'
 export ROOT_URL='https://example.com'
 export MAIL_URL='smtp://user:pass@mailserver.example.com:25/'
+export MAIL_FROM='wekan-admin@example.com'
 export PORT=8080
 ```