While all the hosts atop our email hosting reviews tout reliable security features, SiteGround and InMotion lead the market when it comes to secure email hosting. As you’re comparing hosting plans, look for words like IMAP or POP3, SPAM filtering, virus protection, and 24/7 server monitoring. SiteGround and InMotion Hosting offer all of the above, whether you’re shopping for business or pleasure.
Your next major concern will be compatibility. It's not a shock that most businesses run on Microsoft Windows and use some form of Microsoft Office. Being able to use common third-party clients such as Microsoft Outlook can often be a concern, and even today, compatibility with Microsoft Outlook isn't necessarily guaranteed. This is especially true when sending and receiving meeting invites. It only takes one garbled meeting invite to realize how frustrating this can be in the real world. Even if using Microsoft Outlook isn't a concern, portability is. If the service is entirely web-based, then is there a means for me to take my email offline and send email when I connect?