Mail client

From Wikipedia

 send mails
       send fax
       direct mailing
       Send mail via sockets / with authentication
       receive mails
           list view
           detail view
           check mails
           options
           email account administration
               check a single email account
               sender / signature
               rules

Please be aware of: Depending on the configuration of the installation you can use the mail module fully featured (send and receive emails) or just send emails. With the click on the tab you will get a listview running the fully featured module and the send-form running the second option.