diff --git a/scripts/_common.sh b/scripts/_common.sh
index fe5e956..77f027c 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -265,3 +265,52 @@ ynh_psql_drop_user() {
 	user="$1"
 	su --command="dropuser \"${user}\"" postgres
 }
+
+# Send an email to inform the administrator
+#
+# usage: ynh_send_readme_to_admin app_message [recipients]
+# | arg: app_message - The message to send to the administrator.
+# | arg: recipients - The recipients of this email. Use spaces to separate multiples recipients. - default: root
+#	example: "root admin@domain"
+#	If you give the name of a YunoHost user, ynh_send_readme_to_admin will find its email adress for you
+#	example: "root admin@domain user1 user2"
+ynh_send_readme_to_admin() {
+	local app_message="${1:-...No specific informations...}"
+	local recipients="${2:-root}"
+
+	# Retrieve the email of users
+	find_mails () {
+		local list_mails="$1"
+		local mail
+		local recipients=" "
+		# Read each mail in argument
+		for mail in $list_mails
+		do
+			# Keep root or a real email address as it is
+			if [ "$mail" = "root" ] || echo "$mail" | grep --quiet "@"
+			then
+				recipients="$recipients $mail"
+			else
+				# But replace an user name without a domain after by its email
+				if mail=$(ynh_user_get_info "$mail" "mail" 2> /dev/null)
+				then
+					recipients="$recipients $mail"
+				fi
+			fi
+		done
+		echo "$recipients"
+	}
+	recipients=$(find_mails "$recipients")
+
+	local mail_subject="☁️🆈🅽🅷☁️: \`$app\` was just installed!"
+
+	local mail_message="This is an automated message from your beloved YunoHost server.
+Specific informations for the application $app.
+$app_message
+---
+Automatic diagnosis data from YunoHost
+$(yunohost tools diagnosis | grep -B 100 "services:" | sed '/services:/d')"
+
+	# Send the email to the recipients
+	echo "$mail_message" | mail -a "Content-Type: text/plain; charset=UTF-8" -s "$mail_subject" "$recipients"
+}
diff --git a/scripts/install b/scripts/install
index 9780f50..dd7855a 100755
--- a/scripts/install
+++ b/scripts/install
@@ -273,3 +273,14 @@ fi
 #=================================================
 
 systemctl reload nginx
+
+#=================================================
+# SEND A README FOR THE ADMIN
+#=================================================
+
+message="
+Weblate settings file          : $settings
+If you facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/weblate_ynh
+"
+
+ynh_send_readme_to_admin "$message" "$admin"
diff --git a/scripts/upgrade b/scripts/upgrade
index 08482ba..7464a12 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -207,7 +207,6 @@ then
 	weblate_fill_settings "$settings"
 
 	# send diff to the server administrator
-	mail_subject="'$app' settings diff from $previous_version to $current_version"
 	mail_message="
 	Weblate was updated from version $previous_version to $current_version
 
@@ -225,20 +224,7 @@ then
 	For any issue, please file a bug in: https://github.com/YunoHost-Apps/weblate_ynh
 	"
 
-	# Email server admin - for ACTION
-	echo "$mail_message" | mail -s "$mail_subject" root -u root
-
-	# inform weblate's admin
-	mail_subject="'$app' was updated from $previous_version to $current_version"
-	mail_message="
-	Weblate was updated from version $previous_version to $current_version
-
-	A new settings.py has been created and a diff has been sent to root user.
-	Your administrator may have to update your settings.py to have a fully working installation.
-	"
-
-	# Email weblate's admin - for INFO
-	echo "$mail_subject" | mail -s "$mail_subject" "$admin_mail"
+	ynh_send_readme_to_admin "$mail_message" root "$admin_mail"
 else
 	echo "Settings.py was not modified, using the new default file for $current_version."
 	# generate new defaults settings