Thunderbird since forever. Before that, Seamonkey and the Mozilla suite.
There are some changes I didn't like over the years like the tabbed interface for everything, but nothing else ever came along that worked as well and was multi-platform.
Thunderbird since forever. Before that, Seamonkey and the Mozilla suite.
There are some changes I didn't like over the years like the tabbed interface for everything, but nothing else ever came along that worked as well and was multi-platform.