common way to get access to your e-mail and download mail to be able to get access to it later even offline in this post will show 10 mail clients working on many platform and distributions. many of those clients is fully customized with plugins for easier navigations for your mail client and getting more feature.
Installation Guide and HOW TO
2. Opera Mail
Simple mail client built into web browser for opera browser. check starting guide and Download options for many linux distributions with different packages Here
One of the most popular mail client developed by Mozilla, comes with a lot of features for customizations adding extra add-ons for getting more features and taking control of your mails. and with the last release Thunderbird 3 comes a lot of features, working on cross platform check the Download options
Mail clients by Gnome, usually used to use it on Ubuntu really simple interface with many features even getting more with extra plugins.
The components of KDE Kontact are tailored to work well with each other. This results in features like intuitive drag-and-drop between appointment handling, task lists and contacts. KDE Kontact supports various groupware servers. When using these servers your workgroup has access to features like shared email folders, group task lists, calendar sharing, central addressbooks and meeting scheduling.
Check here for more information
Lightweight email client with many features, Sylpheed provides intuitive user-interface. Sylpheed is also designed for keyboard-oriented operation, so Sylpheed can be widely used from beginners to power users. Download Sylpheed