how send gmail using sim 900 min

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Arduino

i have sim 900 mini module with arduino uno. now i want send gmail using arduino only using at commands? how i do this. pls hep me

this is my code

#include <softwareserial.h>

SoftwareSerial mySerial(10, 11); // RX, TX
bool ack=0;

void setup()
{
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }


  Serial.println("Goodnight moon!");

  // set the data rate for the SoftwareSerial port
  mySerial.begin(9600);
  mySerial.println("Hello, world?");
  
}

void loop() // run over and over
{
 email();
  if (Serial.available())
    mySerial.write(Serial.read());
}


void email(){
  
  
  if(ack==0){
 mySerial.print("AT\r");
 bk();
delay(1000); 

 //mySerial.print("AT+SAPBR=4,1\r");
 bk();
delay(1000); 


 mySerial.print("\r");
 mySerial.print("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"\r");
 bk();
delay(1000); 




 mySerial.print("AT+SAPBR=3,1,\"APN\",\"ppwap\"\r");
 bk();
delay(1000); 

 mySerial.print("AT+SAPBR=3,1,\"USER\",\"\"\r");
 bk();
delay(1000); 

 mySerial.print("AT+SAPBR=3,1,\"PWD\",\"\"\r");
 bk();
delay(1000); 


 mySerial.print("AT+SAPBR=1,1\r");
 bk();
delay(1000); 



 mySerial.print("AT+SAPBR=2,1\r");
 bk();
delay(5000); 


 mySerial.print("AT+EMAILCID=1\r");
 bk();
delay(1000); 


 mySerial.print("AT+EMAILTO=120\r");
 bk();
delay(1000); 


 mySerial.print("AT+SMTPSRV=\"mail.yahoo.com\",587\r");
 bk();
delay(1000); 


 
 //mySerial.print("AT+SMTPAUTH=1,amal.wickramasinghe@yahoo.com,amal991\r");

 mySerial.print("AT+SMTPAUTH=1,\"amaal.wickramasinghe@yahoo.com\",\"amal1991\"\r");
 bk();
delay(1000); 

mySerial.print("AT+SMTPAUTH?\r"),
  bk();
delay(2000); 

mySerial.print("AT+SMTPFROM=\"amal.wickramasinghe@yahoo.com\",\"Andres-GPRS\"\r");
 bk();
delay(1000); 

 


mySerial.println("AT+SMTPRCPT=0,0,\"amalanjula@gmail.com\",\"andres\"\r");
 bk();
delay(1000); 


mySerial.print("AT+SMTPSUB=\"TEST_GPRS\"\r");
 bk();
delay(1000); 


mySerial.print("AT+SMTPBODY\r");
 bk();
delay(1000); 


mySerial.print("CUERPO DEL E-MAIL\r");
 bk();
delay(1000); 

 mySerial.write(0x1A);
    delay(1000);
    
    

mySerial.print("AT+SMTPSEND\r");
 //delay(20000); 
 while(1){
   
   bk();
 }
 
 
delay(20000); 
 bk();
delay(20000); 

ack=1;
}



  
}


void bk(){
   while (mySerial.available())
    Serial.write(mySerial.read());
  
}

this is last reply

SMTPSEND 65

its mean

"SMTP server response error "