1 files changed, 1 insertions, 0 deletions

diff --git a/README.md b/README.md
index 5e58f03..783c2d5 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@ Email credentials used to send emails (like alerts)
 * `SMTP_PASSWORD`
 * `SMTP_USE_TLS`
 * `SMTP_ALWAYS_SEND`
+* `SMTP_MESSAGE`
 
 ### Alert target