E-Mail Swap - Read GMail on Your Blackberry
If you are always on the road, you will of course want a way to read your email on your PDA. This is easy with your service provider's email, but requires a bit more work when you have a thrid party email account such as gmail.
Here are the steps you need to do to enable gmail on a Blackberry:
However, the problem with this approach is that your Blackberry will need to keep polling your gmail account every 15 minutes or so to check and see if there is new mail.
Another approach you can do is to forward your gmail to your Blackberry email. This way, you will get your emails right away. Do not forget though to use your gmail in your Reply-to address.
More explanation can be found on this blog.