This is the Email service that i use interchangably with my own hosted email servers. It is the ultimate backup or ideal as your main email account.
They comply with the highest standards of SPAM protection in the world and i cannot recommend them highly enough.
For business applications you can easily administer your accounts, their service includes the ability to have shared calendars, contacts between staff members.
If you are going to be using ClickFunnels as your Domain Host this is the ideal solution for your Email Hosting.