You could think of the sites that share your server as your roommates; there's really not that much separating you from them. Sure, you can close the bedroom door, but they can still cause nightmares for you in the kitchen and the bathroom. In web hosting terms, all the sites share a single server's resources, so huge traffic spike on Site A may impact the neighboring sites' performances. It's even possible that another site could take down the shared server altogether, if it crashed hard enough.
This is where an email host like SiteGround can be a winning deal for individuals. SiteGround will give you a free domain name, where you get unlimited email hosting that’s compatible with most all major email and webmail clients (RoundCube, Outlook, SquirrelMail, etc.). Your email is secured with integrated anti-SPAM protection, and you can easily manage your account via cPanel, the web’s leading control panel for hosting.
Rounding out the wins, InMotion offers a full 90-day money-back guarantee. On top of that, here's a special money-saving hint. In a chat session confirming pricing and offerings, the operator offered me some special prices and deals that reduced the published price by a few bucks. I was also told that while promotional pricing does go up at the end of the offer period, if you contact customer service, InMotion has a "loyal customer discount" that may bring the price back down.
If you’re on a quest for high quality email hosting, you’ve probably got one of two motives: Either you’re a business owner in need of a professional means to communicate with clients and company contacts, or you’re an individual establishing your personal brand. In either case, you want a reliable email service, unlimited resources, and, ideally, a free domain at which to host your email accounts.
But, again, operationally it's quite strong. 24/7/365 customer support is available not only by live chat and email, but by phone. It offers free site migrations with some dedicated attention paid to making a transfer as smooth as possible. And, if you're willing to go for one of the higher-end plans, the company has put some serious attention into performance and caching.