way2sms is providing this feature for it's users free of cost. It is really cool and you can get all mail alerts with this service, but this service will tell you only sender's mail id and subject. Follow these steps:

(click over the images to enlarge, if you are unable to see it clearly.)
1. Login to your way2sms account and click SETTINGS > MAIL ALERTS as shown in the image.

2. Now, in the bottom panel, you will get your way2sms mail id. Note that.

3. Now login to your gmail account and open mail settings. In that, click FORWARDING AND POP/IMAP.
4. Then click ADD A FORWARDING ADDRESS.

5. Now type your way2sms mail address in the box opened and click NEXT..

6. Gmail will send a confirmation code at your way2sms mail id to confirm you are the owner of that id.

7. Now open your way2sms mail inbox. (settings>mail alerts>inbox)

8. Open the mail received from GMAIL TEAM and note the verification code.
9. Now put that code in gmail mail forwarding verification and click VERIFY.

10. If verified, enable mail forwarding by using the settings as shown in the image.

11. Now click SAVE CHANGES at the bottom. Your free mail alerts is actaveted now.