I want to use ESP8266 to send emails. I tried twice flashing the Firmware to a particular firmware as suggested in a tutorial. Now both my ESP are unresponsive to AT commands. Let me know the way to RESET it. CH_PD + VCC + RST (Tried this combination), No success there any thing i am missing?
The firmware you uploaded to send emails will have overwritten the firmware that responds to AT commands. It is gone and no kind of reset will bring it back. If you need the AT commands again, you must find a copy of the original firmware from the internet and upload that to the esp. Follow INTP's link. But do you really need the AT firmware for something? Just to test that the esp is not faulty?
INTP:
ESP8266 ESP-01: How to Flash AT commands firmware in ESP8266 ESP-01 Wi-Fi module
wow i always had that bin file with me. But had no idead its for resetting. You made my day 
thanks a ton