Airtel offers hosted mail s services, email solutions, hosted exchange services in
India for corporate and small business.Enterprise Grade mailing solution helps you work smarter. With zero investment on hardware or software you can immediately get started.
Airtel’s Hosted Mail is completely managed by Airtel so that you don’t have any hassles of security, backups and upgrades. One can focus on theirr core business and increase productivity while we manage your mailing needs. 

Enterprise grade solution mailing features from Microsoft Exchange Server 2007 
 
Search Made Easy: Search through your email content , contact list and even attachments.
 
Anywhere Access: Messaging and information on the go, so you can access your mails on the desktop, web and mobile.
 
Get More Done Together: Collaboration features which help increase the productivity of your employees. You can share your folders, contacts and calendar with the employees in your organization.

Also read: IT solutions for SMBs
 
Benefits:

Cost Effectiveness: Instant deployment with no capital investment , installation complexity or maintenance hassles.
 
Facilitated operations: Hosting at Airtel Data Centers, on a robust and reliable architecture with network, server and storage redundancy.
 
Professional technical support: 24 * 7 phone based support for all your queries.
 
Enhanced Security: Integrated antivirus and antispam with the mailing solution.
 
Mail box as big as 4GB : So that you don’t have to archive your mails frequently.
 
Pay as you use: Costs are based on a per-mailbox/year basis, depending upon the package you choose. You can purchase mail boxes online and immediately get started.

Customize Packages: Three different packages for different business needs.
 
All this can be managed through a simple and easy to use web interface that allows you to manage the complete mail suite.

source: http://www.airtel.in/