Google Apps standard edition is the best service from google to set up ur emails with 7gb space each. Your users can chat, use google dos, and all great features which Gmail has for us. Wanna Sign up?
Configuring Your MX Records: cPanel
1. Log in to your cPanel account.
2. Click Mail.
3. Click Modify Mail Exchanger (MX Entry). A list of your current MX records will appear.
4. Click Change an MX Entry.
5. In the Change MX for… field, enter ASPMX.L.GOOGLE.COM.
6. Click Change.
Congratulations! Your MX records are now configured to point to Google. Keep in mind that changes to MX records may take up to 48 hours to take effect.
Source: Google Help