We at Penta offers a service to setup Google Apps domain to have the many Google Apps (Google Mail, Google Calendar, Google Docs, Google Sites etc.) for your domain (example.com). Why not Google's infrastructure to power your business-class e-mail ?
Annual Cost - Rs 2500 Per Domain. This includes a basic setup of your existing domain and some user accounts you will need to get going. If you wish to buy a new domain we can undertake this for you also, but the cost depends on what top-level domain you want to use, so please specify this in the form on the below.