I use Thunderbird daily as my email application. It allows me to synchronise all my mail accounts in one open-source platform.

The user interface is intuitive with easy-to-remember keyboard shortcuts and a good variety of themes. I personally use a dark theme.

Thunderbird also has contact, calendar, task, and chat integrations.

The application is also available on mobile, allowing me to keep track of everything on the go. I also have it installed on a laptop that doesn't have the best hardware, so I know it performs well on low-end devices.

Thunderbird is free, so the ROI is amazing.

It also avoids having to forward emails from one platform to another. Review collected by and hosted on G2.com.

If your email is administered by certain organisations, you may have to request admin approval to have your email synced in Thunderbird. Review collected by and hosted on G2.com.