Claws, formerly Sylpheed - comes standard on lightweight distros like Puppy Linux. There's also Geary by Yorba, which has a similar look and feel to the mail c

Claws, formerly Sylpheed - comes standard on lightweight distros like Puppy Linux. There's also Geary by Yorba, which has a similar look and feel to the mail client on OSX but for Ubuntu-based distros. It is standard on ElementaryOS.