Okay, but I can get that if I buy my own mail server, right?

Partially, but you also get burdened with:

• Big up-front expenses (hosting is subscription based and it is at least 50% cheaper even when compared over 3 years)
• Setting up an in-house mail server is a complex operation to get right. Without in-house IT staff you will pay an IT company thousands to do this properly. Even with in-house staff, lack of training may result in a less-than-perfect installation.
• Difficulties inherent in looking after complex technology (constant monitoring, upgrades and support)
• Spam and virus prevention is now a huge task that requires highly sophisticated software and management. Out-of-the-box anti-spam solutions are not able to cope with the type and variety of spam that is sent nowadays. Our enterprise-grade anti-spam devices are an order of magnitude better at dealing with this threat.