How to install Claws Mail on Ubuntu
Claws Mail is a free and open-source email client for BSD, Linux, Mac OS, Solaris, Unix, Windows. You can add some extra features by adding RSS aggregator and calendar plugins. It supports SSL over POP3, SMTP, IMAP4rev1 and NNTP protocols. It provides threaded display, multiple MH folder, Filtering, External editor support. You can configure multiple accounts in Claws Mail. Some other important features are addressbook, automated mail checking, User-defined headers and colour labels. It is lightweight and user-friendly.