Email attachments problem. Pls help!

Mar 26, 2013
I am using the stock email client and I am trying to download an attachment of 11mb pdf. But I always receive this message: This attachment is too large to download over a mobile network. You can download it the next time you connect to a WiFi network

Is there any way to bypass it? To force the system to use the 3G? I have an unlimited plan.