diff --git a/PMB_README.md b/PMB_README.md
index 6b8c2d5..9dd9b8c 100644
--- a/PMB_README.md
+++ b/PMB_README.md
@@ -34,7 +34,8 @@ Then:
     vi .env
     docker-compose up -d
 
-Note: docker-compose down && docker-compose up are necessary. "restart" will not reload .env
+Note: docker-compose down && docker-compose up are necessary. "restart" will not reload .env\
+Note: username can be anything configured as account in protonmail web interface.
 
 ## msmtp test