JUST FOLLOW THESE EASY STEPS...
STEP 1:
CREATE A FREE ACCOUNT HERE
http://m3m.mytoday.com/mailonmobile/homepage.php
You have to give your cell phone number and the password will be sent to you as an sms.
and you will get a ID (ex.91xxxxxxxxxx.m3m.in).
STEP 2: Login to your Gmail Account.
STEP 3: Click Settings... Click FORWARDING and POP/IMAP option.
STEP 4: TICK forward a copy of incoming email check box.
Enter the ID obtained in STEP 1, and click Save Changes and click Save.
U R Done...