diff --git a/docs/MQTT.md b/docs/MQTT.md
index 176ce87279..0f1c62b716 100644
--- a/docs/MQTT.md
+++ b/docs/MQTT.md
@@ -3,6 +3,9 @@
 After you have a working [MQTT broker](https://www.google.com/search?q=setting+up+an+mqtt+broker) you need to configure Tasmota to communicate with it. 
 If you have no knowledge of what MQTT is, you can learn about it from [MQTT Essentials](http://www.hivemq.com/mqtt-essentials/) articles. 
 
+## Warning
+All ESP32 devices (including all varaiants like `ESP32c<x>` and `ESP32s<x>`) natively support encrypted MQTT over TLS. ESP8266 do not natively support TLS unless you compile your own variant with TLS support. Unencrypted MQTT should be limited to own LAN, external unencrypted communication is a very serious security flaw, your device can become a malware bot!
+
 ## Configure MQTT 
 If you flashed a precompiled .bin or didn't enter MQTT info in `user_config_override.h` before compiling you have to configure it on your device first.