From dd8bcef1a3a9d1f40a86fc11ec24f73f982665e4 Mon Sep 17 00:00:00 2001
From: Moritz Zwerger <bixilon@bixilon.de>
Date: Mon, 24 Feb 2025 18:28:03 +0100
Subject: [PATCH] mail loop: Don't send empty body

Most mail servers will flag the message as spam, because `COMPLETELY_EMPTY` will be flagged.
---
 cmk/plugins/emailchecks/lib/connections.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmk/plugins/emailchecks/lib/connections.py b/cmk/plugins/emailchecks/lib/connections.py
index 6bd66e25a83..5d5eed5479f 100644
--- a/cmk/plugins/emailchecks/lib/connections.py
+++ b/cmk/plugins/emailchecks/lib/connections.py
@@ -304,7 +304,7 @@ def send_mail(
     def _send_mail(
         self, subject: str, mail_from: str, mail_to: str, now: int, key: int
     ) -> tuple[str, MailID]:
-        mail = email.mime.text.MIMEText("")
+        mail = email.mime.text.MIMEText("Automatically sent by checkmk")
         mail["From"] = mail_from
         mail["To"] = mail_to
         mail["Subject"] = f"{subject} {now} {key}"