diff --git a/PMB_README.md b/PMB_README.md
index 9dd9b8c..9ef3f6c 100644
--- a/PMB_README.md
+++ b/PMB_README.md
@@ -35,7 +35,7 @@ Then:
     docker-compose up -d
 
 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.
+Note: username can be anything setup as account in protonmail web. Identity and addresses -> my addresses.
 
 ## msmtp test