Mailspring
is everything an email program should be: clean, uncluttered and super
fast. A menu on left-hand side of its simple interface letsyou jump to
folders and options, while the centre pane appears on the right.
In
the free version, you can add up to four accountsfrom services
lncluding Gmail, iCloud, GMX and Outlook. You can search your inboxes
using Google-style search terms, and monitor the popularityof your
emails based on the most-opened subject lines, read reciepts and
tracking links.
Download HERE