# internet related AT commands in SIM5216E

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#### pandi_2u

##### Newbie level 5
recently I bought a 3G shield from elecfreaks. In that I tested AT commands for calling related and camera and SD card related operations. But while trying to send email I got network error. can anyone please help me to solve this problem. below are the commands I used to send email and the replies from sim5216E modem.

Code:
at+cgsockcont=1,"IP","airtelgprs.com"

at+csockauth =1,0

at+smtpsrv="smtp.mail.yahoo.com",465

at+smtpfrom="my_mail_id@yahoo.com","my_name"

at+smtprcpt="to_mail_id@yahoo.com","to_name"

at+smtpsub="test mail"

at+smtpbody="Welcome"

at+smtpsend

+SMTP: NETWORK ERROR
I recharged my sim card with 3G internet pack.
And I tested the 3G frequency of modem (UMTS 2100 MHz) with the frequency we are using for 3G network in INDIA. Both are same.