diff --git a/backend/src/main/resources/application.properties b/backend/src/main/resources/application.properties
index 21b1625..145f340 100644
--- a/backend/src/main/resources/application.properties
+++ b/backend/src/main/resources/application.properties
@@ -7,9 +7,9 @@ spring.cache.cache-names=observations,charts
 spring.cache.caffeine.spec=maximumSize=500,expireAfterAccess=600s
 management.endpoints.web.exposure.include=health,info,metrics
 smtp.enabled=false
-smtp.host=x
+smtp.host=HOST_NOT_CONFIGURED
 smtp.port=587
-smtp.username=none
+smtp.username=USERNAME_NOT_CONFIGURED
 smtp.password=none
-smtp.toaddress=none
+smtp.toaddress=TO_ADDRESS_NOT_CONFIGURED
 smtp.autosendoncomplete=false
\ No newline at end of file