Add submission # 6220

#6220

Author: ArduinoBot

registry.txt

@@ -8071,3 +8071,4 @@ https://github.com/m5stack/M5-LoRaWAN-RAK.git|Contributed|M5-LoRaWAN-RAK
 https://github.com/salernosimone/espkit-arduino.git|Contributed|espkit
 https://github.com/salim-mrw/USB-Rubber.git|Contributed|usbrubber
 https://github.com/xreef/MultiFTPServer.git|Contributed|MultiFTPServer
+https://github.com/mobizt/ReadyMail.git|Contributed|ReadyMail