Mozilla Thunderbird

If you rely on software such as MS Outlook to manage your email, you should consider giving Mozilla Thunderbird a try. Apart from helping you manage your email effectively, Thunderbird comes loaded with a plethora of productivity features such as Calendar, Task Management, and so on. All in all, Thunderbird is a great free alternative to costly e-mail management tools.

Website: https://www.mozilla.org/en-US/thunderbird/