diff --git a/README.md b/README.md
index a4b2f03..e140508 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,9 @@
 [sms-handler](https://philo.ydns.eu/code/Philome/sms-handler) is a simple companion service of the
 [SMS Forward](https://gitlab.com/pierreduchemin/smsforward) app to send notification mails on reception of SMSes.
 
+Its main audience is for people who have a server on the public internet, configured with an email server
+or configured with a mail relay.
+
 
 ## Installation