Alarm System Sending SMTP and Text Messages (using ESP8266)

Using Arduino Networking, Protocols, and Devices
32

You won't know what you are doing wrong until you start reading and displaying the responses from the email server. However, I use smtpcorp's email server, and know that is not the correct port. Use port 2525. edit: And not the correct server.

// change this
AT+CIPSTART="TCP","mail.smtp2go.com",587
// to this
AT+CIPSTART="TCP","smtp2go.com",2525