Recs.
Updated
A mail client support manage multiple accounts, (also supports IMAP & POP3)
Key features:
Complete touch support
Integrated messaging apps
Integrated task management apps
Unified Email Inbox
Contact Manager
Integrated calendar apps
Customization (Colors & layout)
Specs
Pros
Pro Free and paid version
Users who only need to use the basic features of the app have a free version available, though it does limit to only 3 sync'd accounts. There is a paid version that does extend functionality and allows for unlimited account but it does cost $1.00 a month or $45.00 as a one time fee.
Cons
Con Feels more like a browser than an email client
A browser-based app from the windows store, for example, Gmail, does almost everything this client does for free. The calendars in MailBird don't sync with your email addresses. You have to manually change them, whenever you want to switch between calendars. Every time you perform a function, it's like it's downloading a browser view of your accounts for display, rather than performing an internal function. Totally has the look and feel of using a browser-based email client.
Con Price jacks up between your first and second visits to the site
The first visit to the site offers one price, but a revisit later on reveals a much higher rate.
Con Poor import/export of contacts
You can only import your contacts data via CSV, which isn't the most popular choice. Much more convenient ways to do so exist. Even the older Windows Life Mail program is more flexible when it comes to contacts and offers such features as duplicate checks.