diff --git a/sysadmin/letsencrypt_mail.py b/sysadmin/letsencrypt_mail.py
index 9859517..1a24e01 100644
--- a/sysadmin/letsencrypt_mail.py
+++ b/sysadmin/letsencrypt_mail.py
@@ -10,7 +10,7 @@ import fileinput
 import drymail  # Vendored
 
 
-SUBJECT = "Certbot status: {0}"
+SUBJECT = "Certbot certificate renewal - Status: {0}"
 HEADER = {"X-Notification-Type": "letsencrypt"}