What are some alternatives?
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Zoho Mail - Zoho Mail is a webmail service built with the needs of a modern business in mind.
Gmail - Gmail is a free search-based web-mail service.
Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
FastMail - Email, calendars, and contacts to highest standards of security, privacy and reliability.
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.