diff --git a/docs/email.md b/docs/email.md
index 1c42ca2e1676c11a7a42c4da3ac6ea203fea6975..0a17552b3d3674a19deefe5a409d9f1011ffccc5 100644
--- a/docs/email.md
+++ b/docs/email.md
@@ -16,6 +16,13 @@ If the user wants to forward email, either enter the destination directly in
 the /etc/postfix/users file or enter a username and then put the destination
 into `~username/.forward` so that they can edit it themselves.
 
+If the user is a new onboarded user the password has to be made empty, so the
+user can login and set a password:
+
+```
+passwd -d $username
+```
+
 # SMTP Architecture
 
 All hosts should be relaying outbound SMTP traffic via our primary MX server